Ahrefs domain authority equivalent. So you can ensure your furry friend. Ahrefs domain authority equivalent

 
 So you can ensure your furry friendAhrefs domain authority equivalent  Ahrefs is another popular SEO tool that can analyze the domain authority of your website

Let’s take a deeper look at each feature. Google Indexed Pages Checker – Along with da pa and spam score, our tool allows checking indexed pages on Google for each domain. Searchmetrics is one of the lesser-known domain analysis tools you can use if you need an alternative to Semrush free of charge. When you have completed the Domain Authority check, scroll down to the bottom of the page where you’ll find the average DA an PA for your query. 1. Its free features include: On-page SEO report. For web applications: 1. It has all the key features of Ahrefs including rank tracking, backlink profile analysis, keyword research, site audit, competitor analysis, and SEO reports. And because each of these brands uses its own unique calculation and link indexes, your website’s scores could vary widely for each metric. Enter a few relevant keywords (e. ベンチマーキングで競合に対抗しましょう. 2. all - Equivalent to index, follow. Each company clearly has a different methodology for counting domains. Single Grain is a leading, full-service digital marketing agency founded. Domain authority is calculated by analyzing a website’s backlink profile, specifically the number of links pointing to the domain from other websites, as well as the quality of those links. Ahrefs. target_ahrefs_clean_dtypes = target_ahrefs_raw. I’d recommend looking at traffic estimates over DR here. e. Ahrefs conducted a study examining the average age of top-ranking pages, as an indication of how long it took to reach that rank. Ahrefsは、私たちのチームが毎日使っている実用的な洞察への扉を開いてくれ、数え切れないほど多くの方法で私たちのSEO戦略を強化してくれています。. The 301 part refers to the HTTP status code of the redirected page. About This Gig. If you rank at the bottom of a search or. To make things a bit easier we generate a list of keywords for you based on what is working for your competitors. Ahrefs uses a website’s backlink profile to determine their DR. Anchor Text Ratio. Does Ahrefs Use Domain Rating When Crawling the Web? Ahrefs does use DR for their web crawlers to help them determine how many of that website’s pages to crawl. Crucially, Ahrefs uses its own proprietary ranking called “Domain Rating”, instead of Moz’s “Domain. Think about it; there are only a handful of websites in the world with millions of backlinks (Twitter, Facebook, YouTube, etc. . It describes the relevance and credibility of the website in a related niche. The exact meaning will differ depending on which tool you use. Here are the best alternatives. The Ahrefs SEO Toolbar is a versatile free multi-tool for SEO professionals and webmasters, encompassing a range of valuable features such as: 🔸 On-page SEO report (meta tags, word count, etc. Ahrefs doesn’t have this feature, though it does show you which of your backlinks have the lowest domain authority. Moz Domain Authority: 50. Try Content Marketing Toolkit. As well as the websites linking to you, whether they are dofollow or nofollow and a lot of other useful data. Once you’ve established there’s been a Google update, you’ll need to check its date against your total organic traffic to see if there’s been a drop at the same time. The higher a website’s Domain Rating (DR), the stronger and more authoritative it is. 13. Which makes comparing their pricing to Semrush a little more complicated. If you have a high-authority site, these domains should be easy to outrank (so long as the quality of your content is high). Rank Tracker – Our most popular solution for. The concept of website authority in SEO shouldn’t be confused with the. Login . 有多少个网站指向了你的站点. Ahrefs – No special discount, but you can get a ~20% discount on an annual subscription. Additionally, they’re both independent metrics that have no bearing on a site’s current or potential ranking. A subdomain is a part of a website that’s placed under that website’s root directory. But our data doesn’t support that. See how much traffic your competitors are getting. So you can ensure your furry friend. 1. David Stein, VP of Content and SEO, Wunderman Thompson. , Domain Rating). #2 Ahrefs – Domain Rating (DR)Column Type Where Having Description; domain_rating int − + Domain Rating of the target domain. Click on the card to get more data (if you need it). Ahrefs will be able to handle it! Ahrefs is designed to process lots of data in a short period of time. 1. This site used an expired domain and created People Also Ask (PAA) spam content. Domain Authority. For any site that you've set up. The free tool above shows your website’s. It ranges from 0 to 100, with higher. If you are in a boring niche, getting high quality backlinks can be challenging. Ahrefs is a comprehensive SEO tool that allows users to track their website's organic traffic and backlink profile. Domain Authority is a Moz metric that predicts a website’s performance on search engines. At Ahrefs, the. ahrefs’ domain authority checker feature is easy to use and provides accurate results that can help inform decisions about how to improve your counterparty’s online presence. Translate, then optimize. The general authoritativeness of the referring website. This feature lets you analyze any domain URL. Subdomains. The better quality backlinks you accrue from other sites with high DR, the higher your DR will become! 8. They include our own collection of free SEO tools, as well as a few select third-party tools that we trust. 9% of sites. To that tune, if you rank, say, #10, your SEO visibility is at 2%. 35% SEO visibility is when you rank #1 for your keyword. Domain Authority is purely based on theory and is, more than anything, a vanity metric. While DR shows the strength of a website’s backlink profile. Does Ahrefs come with a free trial? A. Organic Keywords. It will give you tons of insight into your competitors and you will make much better marketing decisions. Redirect tracer with HTTP Headers. Keep running through the process above to continually increase your website authority and improve SEO. It is measured on a scale from 0 to 100, with the latter being the hardest to rank for. Just follow these steps: Go to the Ahrefs website. Don’t forget you can use Ahrefs Webmaster Tools to get free access to tons of their tools and data. There is also another variant of this metric called Domain rating, developed by Ahrefs. When a site scores higher on the DR scale, it means the website has a solid backlinks profile. nositelinkssearchbox - Prevents Google from showing a sitelinks search box in the search results. Most Ahrefs users know the importance of. But Trust Flow and Topical Trust Flow are both 100% unique to Majestic SEO. Walkin’ Pets BlogDogTipper is a blog by Handicapped Pets for pet parents with disabled, senior, and special-needs pets. It is represented by an addition at the front of the root domain name. However, you need an active paid account at ahrefs. Domain Rating is an important component of Ahrefs Authority Score. While you can use it to illustrate general improvement in linkbuilding efforts over time, having a higher domain authority score from. Q2. Use the interactive graph to see how traffic has progressed both globally and locally in 171 countries. 0. Ahrefs Website Authority Checker. Ahrefs said they tried to. The higher a website’s Domain Rating (DR), the stronger and more authoritative it is. This is largely niche dependent, but once you establish topical authority, generally speaking, you’ll need fewer backlinks. Moz’s Domain Authority (DA) Ahrefs’ Domain Rating (DR) SEMRush’s Authority Score; Each of these tools analyzes the quantity and quality of the links that point to a domain to give it a score out of 100. No, Ahrefs doesn’t come with a free trial. SEMrush. 113775796; Trust Flow. From there, you could investigate each site to see if it’s a potential problem. Q6. Build links more easily. Content. They update their backlink index with new data every 15 minutes. By focusing on building high-quality backlinks, creating. Advertising data in the Semrush domain overview. DR is sometimes referred to as “Website Authority Score. Its main advantages over Content Explorer are its much bigger index of pages (500B vs. SE Ranking: Best for Small Businesses. You’ll know quickly when to make pivots because the data will let you know errors right away. Berikut panduan ahrefs yang bisa kamu gunakan untuk menganalisa backlink kompetitor dengan ahrefs. Ahrefs all-in-one SEO toolset can help you with: - Competitor research: unveil your competitor's organic keywords, backlink strategies and PPC keywords - Link Building: find the strongest backlink opportunities in. Ahrefs is one of the best ways to check the health and URL rating of your website. From the basics like rank tracking to the pro-level backlink insights Ahrefs allows us to be more efficient and more effective SEOs. Look through the report and see if there are any courses you can create by repurposing your content. Domain Authority and its page-level equivalent Page Authority – DA and PA – are two of the best-known and most respected metrics in the SEO industry, widely used to rate a domain or page's rankability. Semrush: Best for Power Users. 33 per month when billed annually. Ahrefs Has More Comprehensive and Up-to-Date Database of Backlinks. com below: As you can see, this is a middling domain without a lot of strength. According to their. Ahrefs Has More Comprehensive and Up-to-Date Database of Backlinks. Generally, a score of 40 or above is considered good, while a score of 50 or above is considered excellent. It is based on various factors, such as the quality and quantity of your backlinks, your. Platforms such as Ahrefs, Semrush, and Majestic have also. McMaster states, “Our agency has seen great success using Ahrefs. In this video, you’ll learn the three core factors that’ll improve your website’s link authority in a meaningful way. It is a similar metric to Domain Authority and Domain Rating, but this latest update is designed to provide greater accuracy and be more resilient to manipulation. Ahrefs Domain Rating: 76; Moz Domain Authority: 73; 6. Having technical errors on your website can significantly impact. What is Ahrefs Domain Authority? Ahrefs Domain Authority is a metric that measures the strength and authority of a website's domain. Price-wise, Ahrefs also offers similar package plans to SEMRush. Also called domain authority, this is a search engine ranking score. Ahrefs is a great tool for SEO professionals. 200k+ SEO professionals across the world use it in their daily work. Ahrefs Pte. We have two core ways to track keywords to suit most budgets and businesses: Free keyword rank checker – A quick way to spot-check your keyword rankings for free. Ahrefs does not have a PageRank equivalent, but URL Rating (UR) is the closest option. By simply plugging the potential site from the HARO query in Site Explorer, you can bring up a quick overview of the site’s metrics, including the Domain Rating (DR) and traffic. With the support of our website authority checker tool, you can easily check for domain authority of around 20 websites at one time. However, it's important to remember that DA is just one metric and a high score doesn't necessarily guarantee high search engine rankings or traffic. It has a 30-day free trial and pricing starts at $99 a month. Unfortunately, Ahrefs recently switched over to usage-based pricing. Find contacts for your prospects. It runs on a scale from zero to a hundred. 0. Site Explorer’s Overview 2. . But thanks to many of you, we’ve come to realize that this update actually caused a decrease in search traffic estimations for many websites. Ubersuggest. Check traffic. You can then use the Middleman Method to direct some of that ‘authority’ to the pages that you want to rank. The company offers a website authority checker, where you can examine a similar metric to the “DA” from Moz. Probably the closest competitor to SEMRush, Ahrefs is very similar to SEMRush in terms of features and overall functionality. They both are essential scores to analyze a website’s SEO. This feature lets you analyze any domain URL. So for this example, the metrics look great, with high authority and a huge amount of. The code at the end will let Ahrefs know to exclude your domain, so it doesn’t show up in the results. Maximize your return from Google ads. Moz uses different factors to calculate this score based on a sample of links to a website or page. Google Search Console. Ahrefs empowers users to uncover relevant keywords that resonate with their target audience. g. Each of these apps uses different metrics, but if you’re using Monitor Backlinks, it'll show you everything from Moz’s spam score to Ahrefs’ Domain Authority, which is helpful. Web Explorer lets you search through Yep, our search engine’s, entire database of pages and links using search operators. 3. To calculate the domain authority for referring domains, Majestic uses a metric called “Trust Flow” while Ahrefs uses “Domain Rating”. This helps you to understand the quality of the backlinks your target has, since links from high-authority websites have more weight than those from low authority websites. Ahrefs – No special discount, but you can get a ~20% discount on an annual subscription. However, Ahrefs clarifies that the term "website authority" is synonymous with “domain authority” as an SEO concept, instead of Moz's own metric. In SEO, DA stands for Domain Authority, whereas DR stands for Domain Ranking. Use Ahrefs to identify your top competitors based on factors such as keywords, domain authority, and backlink profile. It was initially created by Moz; AHREFs and SEMRush launched their own equivalents. On the other hand, Ubersuggest, created by an esteemed SEO expert, provides an intuitive interface and caters to marketers of all levels. Domain Rating = AHREFs. Let’s get right into it. When you conduct a DR check, higher scores correspond to a much better ability to rank well for certain terms and. So that metric isn’t super unique. Site Explorer. Ahrefs boasts a vast database of billions of keywords, offering in-depth competitor analysis and precise reports. As a hypothetical example, Ahrefs’ web crawlers might crawl 1000 or so URLs for. An exclusive Semrush Trial that lasts for 14 days, whereas Ahrefs stopped offering its 7-day trial for $1. Part 2. Monitor Backlinks claims to have “The best monitoring tool for backlinks and keywords, period. Updated: August 10, 2023 6 min read. Our free keyword generator can help you discover 150 keyword ideas for (almost) any keyword. A new and improved traffic estimation. 3/ See keywords that bring you traffic. It was developed by Ahrefs, a popular SEO tool provider, and was first introduced in 2016 as an alternative to other domain authority metrics like Moz’s Domain Authority. The more links there are on the page that links to you, the less authority will be transferred to you because it’s shared between all of those pages (due to the PageRank algorithm). Domain Authority (DA) is a search engine ranking potential score (0-100) invented by Moz that predicts how likely it is for one website to outrank another in search results. For all other types of businesses, there is a 20% discount on the annual subscription. com. All Ahrefs’ packages are $0. The more backlinks a website has, the better its domain authority (DA) or domain rating (DR) — and authoritative websites tend to garner a lot of links. How to Check Domain Rating/Authority (3 Methods) 1. target_ahrefs_clean_dtypes = target_ahrefs_raw. Monitor Backlinks. Ahrefs' DR ranking and Moz's DA ranking are the two most popular ways to quantify domain authority. You Need Fewer Backlinks. The first way is to set a Keyword difficulty (KD) filter. PharmaCare approval does not indicate that the. But this functionality goes beyond mere keyword suggestions, it also touches on relevant keyword. . Number of backlinks. Having technical errors on your website can significantly impact. 4. Ahrefs. Ahrefs is significantly lower. Ahrefs found similar results: “Top-ranking pages do tend to acquire more backlinks (and at a faster pace) than the pages that rank below them. Moz took the lead in developing a Domain Authority score as part of its SEO tool suite. Semrush is one of the top digital marketing tools to perform site analysis, keyword research, competitor analysis, content marketing, and marketing campaign management for businesses. As mentioned above, it’s Moz who initially coined the term Domain Authority. Along with its keyword research tool, SEMrush has a unique feature Ahrefs doesn’t have. The organic overview in the Semrush Domain analysis tools has a. Overall Website Performance Requires Both. are responsible for providing local services and governance to approximately 89 percent of the province's population. com The first and most obvious possibility is just the shape of the model itself. Ahrefs Review & Tutorial 2023: How To Create Content That Sticks & Build Links That Count. Domain Authority is not a Google metric. Ahrefs has been the number one tool in our SEO tool belt for many years. August 8, 2023 2 min read. Meta description tag missing or empty – 72. Semrush – No special discount, but you can get a 16% discount on an annual subscription. The tool shows you errors, crawl issues, and makes actionable recommendations. 1. To find dropped domains, you can use domain registrar auctions like GoDaddy, or tools like Spamzilla that filter and analyze expired domains across multiple marketplaces. It’s important to understand that these are just tools, so you’ll want to take these ratings with a grain of salt. If you like it and you want a paid version, Ubersuggest is still WAY more affordable than Ahrefs. com のドメイン評価は 88 です。. me started offering similar products a few years ago. Price-wise, Ahrefs also offers similar package plans to SEMRush. Check your organic traffic in Ahrefs’ Site Explorer. ahrefs_top int − + Ahrefs Rank of the target domain. Go to the Link opportunities report. In the long run, you still spend less, saving almost a dollar monthly. Filter for low-competition keywords with the KD filter (KD < 10) Add words like “buy” and “cheap” to the “Include” filter. Ahrefs Free Backlink Checker. The more backlinks a website has, the better its domain authority (DA) or domain rating (DR) — and authoritative websites tend to garner a lot of links. Ahrefs Introducing a New Ahrefs’ Domain Rating Calculation. Related: List Of Top Bulk DA Checkers. Ultimately,. But you need contact details as part of your prospecting to reach. Domain Authority and its page-level equivalent Page Authority – DA and PA – are two of the best-known and most respected metrics in the SEO industry, widely used to rate a domain or page's rankability. 3. Domain Authority is the score given to your domain according to its strength and potential. This theoretically makes the Semrush authority score more accurate than the Ahrefs equivalent. This tool has no cost and can check Domain and Page Authority metrics for several URLs. Q3. Domain authority: score 1 - 100. 3. Ahrefs is More User-Friendly. There are several ways you can measure the authority of a domain. Choose Any word. It provides tools for keyword research, backlink analysis, and rank tracking. ベンチマーキングで競合に対抗しましょう. This can help you identify relevant sites with high domain authority and high-quality. Domain Rating (DR): URL Rating applied across an entire site (this is basically the equivalent of Moz Domain Authority). According to Ahrefs, the “Domain Rating (DR) shows the strength of a website’s backlink profile compared to the others in our database on a 100-point scale. It's essentially a less granular version of Ahrefs Rank (AR). Semrush is the usual go-to alternative for Ahrefs. Super useful to analyze your website as well as your competitor’s links. Single Grain. Filter explicit results for obvious reasons. A Domain Authority score ranges from one to 100, with higher scores corresponding to a greater ability to rank. Ahrefs SEO Toolbar is a free extension for Chrome and Firefox that provides valuable SEO data about the pages and websites you visit. The free tool above shows your website’s “authority” as calculated by Ahrefs (i. How. MozBar. Still, for Digital Ocean, it took them one year to grow from an 87 to an 89. With DR and DA, a site is given a ranking from 0 to 100. To calculate DR, we consider: When a domain's DR is higher, more "link juice" is transferred to linked domains. Here, 35% represents the amount of clicks that you can generally expect to get when ranking #1 for a search term. Các chỉ số AS, DA, DR, TF được tính toán dựa trên những yếu tố nào. Get more referral traffic. ahrefs’ domain authority checker feature is easy to use and provides accurate results that can help inform decisions about how to improve your counterparty’s online presence. We picked some of the biggest brands on the Internet and ran them through this. But if you’re still shopping around, keep these two elements of a good domain in mind. From the basics like rank tracking to the pro-level backlink insights Ahrefs allows us to be more efficient and more effective SEOs. The domain we purchased for the expired domain experiment had only nine referring domains. Rule #3: Use the correct domain version (HTTPS vs. 1. Calculated as a combination of the quality and quantity of backlinks that point to that page. 1). 340. Municipalities in B. Select "Domain Authority Checker". Here are my best picks and alternatives to Ubersuggest: SEMrush (Paid) Ahrefs (Paid) Mangools (Paid) KeyWordTool. 3. Let’s explore the strengths and weaknesses of both tools, helping you make an informed. Get automated email alerts about your. 3. 先让我们来看下影响 Domain Rating(域名评分)的三大要素: 有多少个网站指向了你的站点; 指向你的网站的DR(域名评分) 反链域名网站指向其它网站的数量; 1. Unlike multi-page websites, the user is unable to navigate to content on separate URLs via internal linking. The higher the score, the higher likelihood of ranking. Which shouldn’t come as a surprise, because Ahrefs’ Domain Rating metric (shows the strength of a website’s backlink profile) correlates well with Google rankings. You can take advantage of this feature by. 1. The free tool above shows your website’s “authority” as calculated by Ahrefs (i. Go to your Dashboard. The Ahrefs free domain authority checker shows your backlink profile when giving your domain rating. 0 - Moz. Its free features include: On-page SEO report. 3. UberSuggest – Best SimilarWeb alternative FREE. The free tool above shows your website’s “authority” as calculated by Ahrefs (i. Website Authority Checker (Ahrefs) Like Moz, Ahrefs is a well-known SEO tool. Domain Rating (DR): URL Rating applied across an entire site (this is basically the equivalent of Moz Domain Authority). This lists every page that links to your site, including metrics like Domain Rating (An Ahrefs proprietary metric similar to Domain Authority; this hints at the quality of the link), traffic, anchor text, target URL and date first seen. It’s the second largest crawler on the internet, after Google, and it can help you discover the most minute details about keywords, ranks, SERPS, and backlinks. Enter a few relevant keywords (e. Ahrefs SEO Toolbar is a free extension for Chrome and Firefox that provides valuable SEO data about the pages and websites you visit. ”. If your website "authority" is higher than that of your competitors, then your site is stronger than theirs in terms of "link popularity. Large image files. Translate your site without thinking about SEO, then optimize the new content by ensuring it targets the right keywords and rewriting Metatags so they’re the correct length. For example, if the delta for this number is +1. Here at Ahrefs, we have a website authority metric of our own called Domain Rating. Keyword Difficulty (KD) is an SEO metric that estimates how hard it would be to rank on the first page of Google for a given keyword. It's a very good alternative for Surfer, but if you want keyword volume, domain authority data, you need to buy (in case of two codes) a $35 subscription for SEO addon. The information you. Ahrefs introduced Domain Rating, and Moz introduced Domain Authority. Increase Domain Authority of your site DR 50+ in 30 day. So if you want an Ahrefs alternative with a list of similar features, I recommend trying SEMrush. These domains are scored out of 100. Walaupun berbayar, tapi jika mendapatkan fitur yang dapat membantu perkembangan. Anchor text is the text used when hyperlinking. Your business name without hyphens or special characters is. Clean the dofollow_ref_domains column, which tells us how many ref domains the site. 1. You’ll know quickly when to make pivots because the data will let you know errors right away. 200k+ SEO professionals across the world use it in their daily work. 120763308; Domain Rank (Ahrefs): 0. Apart from Ahrefs, SE Ranking is an all-in-one SEO tool you may use in place of SEMrush to get excellent. The first way is to set a Keyword difficulty (KD) filter. Ahrefs Pros. It is simple to improve the domain authority and page rank, but an SEO can use some effective strategies to boost the website ranking in the search engine results. Domain authority (DA) is a metric that measures how likely your website is to rank well on search engines. ”Ahrefs keyword tools offer fewer features, as the keyword research tool consists of two main features: Keyword Explorer. Domain Rating (DR) is a ranking metric developed by Ahrefs which shows the strength of a website’s backlink profile on a scale of 1 to 100. Here’s how you can see these opportunities: Go to Ahrefs’ Competitive Analysis tool. The whole point of prospecting is to find sites to approach via outreach and acquire links from them. Written by Tim Soulo [Ahrefs] Updated over a week ago. Here are 10 comparisons these professionals highlighted regarding Ahrefs and Moz as domain authority checkers: Ahrefs Has the Edge With its Visuals and. Domain Authority and Domain Rating are almost similar, but they still have some significant differences. I just bought 2 codes for Frase, lifetime for $150 I found it on appsumo BF page. We use Ahrefs to better track our SEO performance and keyword rankings. In app. Make a copy of the previous dataframe and give it a new name. Use our tool to get your website’s Domain Authority (DA), Backlinks, and Referral Domains. Our data shows that a site’s overall link authority (as measured by Ahrefs Domain Rating) strongly correlates with higher rankings. Ahrefs serves up these metrics in a way that's easy to digest. Moz’s domain authority and Ahrefs’ domain rating are both great metrics, so use whichever you prefer. 6 Best Ubersuggest Alternatives for Better Keyword Research. Domain Rating from Ahrefs, Domain Authority from Moz, and Trust Flow from Majestic are all tools that try to figure out what Google is thinking. Neither of these you can access with the extension and AHREFs doesn't have equivalent tools. Keywords that contain your seed in the order it's written. Domain Rating. With ahrefs, you can quickly ascertain the strength or weaknesses of a top-level. Though Ahrefs’s paid subscription is an incredibly powerful SEO tool, their free website authority checker only provides very general data, namely: Domain rating. Links from websites with a high domain authority are more valuable than those from sites with low authority. The concept of UR is similar to Moz’s Page Authority (PA) metric. DR is measured on a logarithmic scale from 0 to 100, with the latter being the strongest. Ahrefs developed its own metric called. 33 per month. ahrefs. 9. You can utilize our bulk domain authority. 1K for the last 30 days, this means that the target has 1100 more linking domains than 30 days before (note - bigger numbers like this one are rounded in the dashboard). Agak berbeda dengan MOZ, Ahrefs tidak menggunakan istilah DA dan PA. The tool even provides information about the number of unique backlinks, root domains, and number of keywords ranking for a specific domain. Domain authority measures it at a site-wide level. The tool will show you the Domain Authority and other relevant scores and comparisons. 1). If that were true, time (length of engagement with us) would matter less than domain authority. Moz has one. Dead pages. Get a better understanding of your website’s SEO potential with the help of actionable SEO metrics like Search Volume, Keyword Difficulty, and Traffic Value. The free tool above shows your website’s “authority” as calculated by Ahrefs (i. Eventually, Google's own analyst John Mueller has confirmed this by saying that they “don't have anything like a website authority score”. AR ranks the websites in Ahrefs’ database according to the size and quality of their backlinks. 5. Create high-quality content (that people want to read) Domain authority can be likened to the influence of an expert within their own discipline and in the larger scholarly community. 2. However, slugs can also contain. Add all your competitors to the bulk Domain Authority checker.