Site Information
seo-theory.com
Link authority for seo-theory.com (registrable domain: seo-theory.com) from the Common Crawl web graph: PageRank and harmonic centrality history since 2017, current scores, and the site's top backlink sources.
Link authority data (PageRank, harmonic centrality) and backlinks come from the Common Crawl web graph.
Current Scores
Web-graph authority (0-100)
Domain scores measure seo-theory.com as a whole: every subdomain's links rolled up into one node of Common Crawl's domain-level web graph. Host scores measure the exact hostname seo-theory.com. WWW scores cover the www variant of that hostname, which the graph tracks as its own entry since January 2026 (before that, www and bare host were merged). A big gap between domain and host usually means the domain's authority lives on other subdomains. PageRank is link-endorsement authority: how much weight the sites linking here carry themselves. Harmonic centrality measures reach: how close this site sits to the rest of the web when following links, which favors broadly connected sites over ones boosted by a few heavy linkers. All are normalized 0 to 100 within each crawl snapshot; a dash means that series does not exist for this site.
18
Domain PageRank
1
Host PageRank
12
WWW PageRank
95
Domain Harmonic Centrality
94
Host Harmonic Centrality
95
WWW Harmonic Centrality
Site Intelligence
Homepage
What seo-theory.com presents on its own homepage: the page title, description, and the social share markup it publishes. Pulled from https://seo-theory.com.
| Title | SEO Theory – Algorithm analysis, Web community relationship analysis, SEO practices and techniques, industry news, etc. |
|---|---|
| Description | Algorithm analysis, Web community relationship analysis, SEO practices and techniques, industry news, etc. |
| OG Title | SEO Theory |
| OG Description | Algorithm analysis, Web community relationship analysis, SEO practices and techniques, industry news, etc. |
| OG Site Name | SEO Theory |
Site Intelligence
Social accounts and contact points
Where this site maintains a presence and every reachable route its homepage exposes: social accounts, contact pages, addresses, and content feeds.
Site Intelligence
Structured data (JSON-LD)
The schema.org markup this homepage publishes: the machine-readable identity search engines and AI systems read. Types found: Blog, WebSite.
JSON-LD block (30,868 bytes)
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He was previously the Director of Search Strategies for a Seattle area startup and Senior SEO Manager for a Bay Area company.\r\n\r\nA former moderator at SEO forums such as JimWorld and Spider-food, Michael has been active in search engine optimization since 1998 and Web site design and promotion since 1996.\r\n\r\nMichael was a regular contributor to Suite101 (1998-2003) and SEOmoz (2006).\r\n\r\nMichael Martinez is also the author of the <a href=\"https:\/\/www.seo-theory.com\/premium\/newsletter\/\">SEO Theory Premium Newsletter<\/a>, a weekly publication loaded with \"how to\" articles and in-depth SEO analysis.","image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/551ddeb73713c4bf1dca64652cb07b26f19586e31c3734ab89db417b56368e00?s=96&d=blank&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/551ddeb73713c4bf1dca64652cb07b26f19586e31c3734ab89db417b56368e00?s=96&d=blank&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"Reflective Dynamics, Inc.","logo":{"@type":"ImageObject","@id":"https:\/\/www.seo-theory.com\/wp-content\/uploads\/2025\/12\/seo-theory-blog-logo.jpg","url":"https:\/\/www.seo-theory.com\/wp-content\/uploads\/2025\/12\/seo-theory-blog-logo.jpg","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/www.seo-theory.com\/wp-content\/uploads\/2026\/06\/your-sites-receive-more-traffic-than-you-realize.jpg","url":"https:\/\/www.seo-theory.com\/wp-content\/uploads\/2026\/06\/your-sites-receive-more-traffic-than-you-realize.jpg","height":360,"width":720},"wordCount":2077,"keywords":["analytics","bing","DigitalMarketing","google","seo"],"commentCount":"3","comment":[{"@type":"Comment","@id":"https:\/\/www.seo-theory.com\/your-sites-receive-more-traffic-than-you-realize\/#Comment1","dateCreated":"2026-06-08 13:20:48","description":"Very soon now many agents <i>will<\/i> be buying things directly from Websites. Of course, we don't want them to click on the ads. That's not fair to the advertisers.\n\nIf I had to make an assumption, I would assume that a significant percentage of the Dark Traffic is real people who buy things, click on ads, sign up for email or newsletters, etc.\n\nA good place to start is to evaluate a site's conversion journey. Is it creating friction for real human visitors? If so, reduce that and growth in conversions should allay people's concerns about any perceived loss of traffic.\n\nBeyond that, we need to improve our measurement and understanding of who or what is visiting our sites and why. None of the analytics tools I work with today are doing an effective job. They all need to be improved.","author":{"@type":"Person","name":"Michael Martinez","url":"https:\/\/www.michael-martinez.com\/"}},{"@type":"Comment","@id":"https:\/\/www.seo-theory.com\/your-sites-receive-more-traffic-than-you-realize\/#Comment2","dateCreated":"2026-06-08 12:34:27","description":"Hey Michael! What do you think this traffic is valuable for? If it is just robots they won't buy anything. Or the clicks on adverts will be decounted. How do we make money from the invisible traffic?","author":{"@type":"Person","name":"Sergei Venkov","url":""}},{"@type":"Comment","@id":"https:\/\/www.seo-theory.com\/your-sites-receive-more-traffic-than-you-realize\/#Comment3","dateCreated":"2026-06-08 05:36:24","description":"Great reminder that website traffic is often broader than what analytics reports show. Understanding hidden traffic sources can lead to better SEO decisions.","author":{"@type":"Person","name":"MacMillan","url":"https:\/\/www.macmillanscg.com\/"}}]},{"@type":"BlogPosting","@id":"https:\/\/www.seo-theory.com\/foreshadows-of-ai-doomsday-you-should-know-about\/","headline":"Foreshadows Of AI Doomsday You Should Know About","url":"https:\/\/www.seo-theory.com\/foreshadows-of-ai-doomsday-you-should-know-about\/","datePublished":"2026-05-11","dateModified":"2026-05-11","mainEntityOfPage":"https:\/\/www.seo-theory.com\/foreshadows-of-ai-doomsday-you-should-know-about\/","author":{"@type":"Person","@id":"https:\/\/www.seo-theory.com\/author\/michael\/#Person","name":"Michael Martinez","url":"https:\/\/www.seo-theory.com\/author\/michael\/","identifier":2,"description":"Michael Martinez of SEO Theory is the President and co-founder of <a href=\"https:\/\/www.reflectivedynamics.com\/\">Reflective Dynamics<\/a>. 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{"@context":"https:\/\/schema.org","@type":"WebSite","@id":"https:\/\/www.seo-theory.com\/#website","name":"SEO Theory","url":"https:\/\/www.seo-theory.com","potentialAction":{"@type":"SearchAction","target":"https:\/\/www.seo-theory.com\/?s={search_term_string}","query-input":"required name=search_term_string"}}Web-Graph History
Authority over time
Every Common Crawl web-graph release since 2017, roughly quarterly. The domain series goes back to 2017; Common Crawl only began publishing the host-level graph in 2020, so host lines start there. Click a legend entry to show or hide that line. Flat lines are normal for established sites; watch for sustained rises or drops, which track real gains or losses in who links here.
A note on www: through the end of 2025 the source web graph merged www and non-www hostnames into the bare name, so one host line covers both. Starting in January 2026 the graph splits them into separate entries, which is why www can carry its own scores going forward.
Backlink Data
Backlink counts
Unique linking domains seen in Common Crawl's link graphs. This is a different dataset than the 0-100 authority scores above: these are raw counts, host-level for seo-theory.com and domain-level for seo-theory.com with all its subdomains combined. Common Crawl covers a large sample of the web, not all of it, so treat counts as comparable between sites rather than absolute totals.
19
Host Backlinks
200
Domain Backlinks
Backlink Data
Top backlinks in the domain graph
Common Crawl publishes two link graphs. The DOMAIN graph connects whole domains: every link from any page of one domain to any page of another. This table shows the highest-authority domains linking to seo-theory.com (including its subdomains), ranked by the linker's PageRank. The table shows the top 200; the download carries the full stored list (up to 10,000 linkers) as JSON. Click a linker for its own site profile.
Backlink Data
Top backlinks in the host graph
The HOST graph connects exact hostnames, so subdomains count separately. This table shows the highest-authority hosts linking to seo-theory.com specifically, ranked by the linker's PageRank. The table shows the top 19; the download carries the full stored list (up to 10,000 linkers) as JSON. Click a linker for its own site profile.
| Linking Site | Linker PageRank | Linker Harmonic Centrality |
|---|---|---|
| hubpages.com | 70 | 25 |
| searchenginewatch.com | 63 | 26 |
| www.mattcutts.com | 61 | 25 |
| www.gpwa.org | 58 | 17 |
| webtan.impress.co.jp | 54 | 19 |
| www.bruceclay.com | 52 | 22 |
| www.searchenginepeople.com | 52 | 22 |
| seo2.onreact.com | 46 | 16 |
| www.thegooglecache.com | 43 | 24 |
| www.smallbusinesssem.com | 35 | 18 |
| www.soloseo.com | 32 | 17 |
| www.potpiegirl.com | 29 | 17 |
| seoroi.com | 27 | 21 |
| boston.conman.org | 27 | 18 |
| www.webhouseit.com | 24 | 17 |
| bitsignals.com | 20 | 16 |
| intercommunication.blogspot.com | 20 | 15 |
| www.webinfomatrix.com | 14 | 15 |
| promored.ru | 10 | 14 |