Technical SEO Wiki & Knowledge Base
Learn the fundamentals of technical SEO. Click on any topic to read the full guide, complete with code examples and best practices.
robots.txt
Learn how to control web crawlers, manage crawl budgets, and block AI/LLM bots effectively.
Read guideTitle Tag
Master the most important on-page SEO element. Discover ideal pixel lengths and keyword placement.
Read guideMeta Description
Write compelling snippets that drive higher Click-Through Rates (CTR) from the search results.
Read guideXML Sitemap
Help search engines discover your pages faster. Learn about sitemap structure, tags, and limits.
Read guideCanonical Tag
Fix duplicate content issues across your site by consolidating ranking signals to a primary URL.
Read guideMeta Robots Tag
Learn how to use the noindex and nofollow directives to control indexing at the page level.
Read guideX-Robots-Tag
Control the indexing of non-HTML files like PDFs and images directly via HTTP response headers.
Read guideCore Web Vitals
Master Google's performance metrics: LCP, INP, and CLS to ensure a lightning-fast user experience.
Read guideLanguage & Hreflang
Optimize your international SEO. Learn how to implement HTML lang attributes and hreflang tags correctly.
Read guideJSON-LD Structured Data
Help search engines understand your content and win rich snippets in the SERPs using Schema.org markup.
Read guideURLs & Status Codes
Build SEO-friendly URLs and understand HTTP status codes — 200, 301/302 redirects, 404s and server errors.
Read guideHeading Structure
Structure your content with H1–H6 tags. Learn the H1 rules, logical hierarchy, and accessibility best practices.
Read guideContent & Readability
Word count, search intent, and the Flesch Reading Ease score — how to write content that ranks and reads well.
Read guideImage SEO
Optimize images with alt text, descriptive file names, compression, modern formats, and lazy loading.
Read guideLink Analysis
Master internal & external links, nofollow attributes, redirects (3XX), and broken links (4XX) for stronger SEO.
Read guideOpen Graph & Twitter Cards
Control how your pages look when shared on social media with Open Graph tags and Twitter Cards.
Read guideRendering (SSR vs CSR)
Understand server-side vs client-side rendering, how Googlebot renders JavaScript, and JavaScript SEO.
Read guidellms.txt & AI Crawlers
Prepare for AI search. Learn the llms.txt standard, the major AI crawlers, and Generative Engine Optimization.
Read guideCrawl Budget
Crawl rate limit, crawl demand and the biggest budget wasters – plus how to analyse both in Search Console and logs.
Read guideIndexing
From discovery to ranking: every page indexing report status and what actually fixes each one.
Read guideDuplicate Content
Internal and external duplicates, near-duplicates and choosing correctly between canonical, 301 and noindex.
Read guideLink Juice & Link Equity
The PageRank model, the damping factor, nofollow and how to steer internal link equity on purpose.
Read guideDomain Popularity
Link, domain, IP and C-class popularity compared – and what these metrics really tell you.
Read guideEntity SEO
Entities, the Knowledge Graph and sameAs: making content unambiguous for semantic and AI-driven search.
Read guideBacklinks
Quality markers, link types, vetting sources and which link building methods still work.
Read guideAnchor Text
Anchor types, a healthy distribution, internal rules, image links and signs of over-optimisation.
Read guideLink Attributes (rel)
nofollow, sponsored, ugc, noopener and every rel value in the head – with a decision tree.
Read guideInternal Linking
Click depth, hub pages, topic clusters and orphan pages: architecture that steers link equity.
Read guideRedirects
301, 302, 307, 308, chains and loops: which status code is right when and where link equity leaks.
Read guidePagination
Self-canonical over page 1, rel=prev/next gone and infinite scroll with a URL base: page series that get indexed.
Read guideFaceted Navigation
The combinatorial URL problem, which filters to index and why only robots.txt saves crawl budget.
Read guideBreadcrumbs
Three jobs, BreadcrumbList markup and the benefit as an internal link system: building breadcrumbs right.
Read guideMobile-First Indexing
Content parity over responsive polish: why the mobile version counts and where content leaks from the index.
Read guideHTTPS and SSL
The TLS handshake, certificate types, mixed content, HSTS and migrating from HTTP to HTTPS without losing rankings.
Read guidePageRank
The original formula, the random surfer model, the damping factor and what remains of toolbar PageRank today.
Read guideReferring Domains
Why the domain count beats raw backlinks: the ratio, growth patterns and how to handle lost domains.
Read guideDomain Authority
Moz DA, Ahrefs DR and Majestic Trust Flow compared – and why Google has no such metric.
Read guideDisavow Links
When disavowing is genuinely needed, the file format – and why most sites should never touch it.
Read guide