Robots.txt Is 200 but Unreachable to Google: A Network Diagnostic
Diagnose a crawler-facing robots.txt failure across DNS, IPv4 and IPv6, TLS, CDN, WAF, redirects, and origin logs instead of trusting one browser request.
From this desk
Start with the most useful page
The featured page offers a strong introduction. The remaining cards help readers move through this editorial section without turning the archive into a service menu.
Read the featured guide
Audit a new website in priority order
Clear indexing and template blockers before polishing lower-impact details. The audit framework shows the order and the evidence to record.
Audit
Find the first blocker
Check crawl access, indexability, page jobs, templates, performance, and measurement in a defensible order.
Launch
Release without guessing
Verify redirects, robots rules, canonicals, rendering, analytics, and rollback before a new site goes live.
Architecture
Give every page a distinct job
Build topic clusters around reader decisions, then keep, reposition, merge, or retire pages when their jobs overlap.
Publishing
Keep claims close to evidence
Use a reader job, claim ledger, source hierarchy, information-gain requirement, and maintenance trigger.
Latest SEO stories
Latest SEO articles
Browse the archive in publication order. Each article keeps its evidence, examples, limitations, and next action together.
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AI-Generated Free Tools: When Utility Becomes Scaled Content Abuse
Apply a 12-point launch gate to decide whether an AI-assisted tool library provides distinct utility or produces thin indexable templates at scale.
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Seasonal SEO After the Event: Keep, Update, Redirect, or Remove?
Choose what to do with an expired event, offer, deadline, or annual page using reader intent, replacement equivalence, historical value, accuracy, and recurring demand.
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Google Business Profile Without a Website: What You Can Verify
A website is not listed as a Google Business Profile eligibility requirement, but eligibility, verification, accurate profile data, and a website serve different jobs.
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Yandex News RSS: Validate a Publisher Feed Before Submission
Validate Yandex news RSS access, XML, article parity, full text, categories, authors, and media groups before submission in Webmaster.
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Crawled — Currently Not Indexed After a URL-Prefix Migration: A Diagnostic Matrix
A URL-prefix removal can expose redirect, canonical, sitemap, internal-link, and content-equivalence failures. Diagnose the migration before blaming an update.
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Article and ProfilePage Markup: Build One Verifiable Author Identity Chain
Connect visible bylines, Article author entities, ProfilePage markup, and external identity links without creating conflicting author records.
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Google-InspectionTool User-Agent Correction: Audit Exact-Match WAF Rules
Google corrected an erroneous semicolon in its Google-InspectionTool user-agent documentation. Audit copied exact-match WAF and parser rules.
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Schema.org 30.0 Is Not a Google Rich Result Update
Schema.org 30.0 expanded the vocabulary, but a vocabulary release does not automatically create Google rich-result support. Audit the two layers separately.
A useful standard
How to use this SEO library
Choose the page that matches the decision in front of you. Each answer distinguishes documented requirements from recommended practice and keeps uncertainty visible.
Exposure before polish
Resolve crawl, index, rendering, and template failures before spending time on refinements that search systems may never see.
One page, one job
Map each page to a reader decision so internal links, headings, and content depth support a clear purpose.
Measure at the right layer
Treat Search Console, analytics, crawls, and experiments as different evidence sources. None proves causation on its own.
References and next steps