Technical SEO #technical-seo
Technical SEO covers everything that affects how search engines crawl, render, and index your site: server response, HTML structure, redirects, sitemaps, structured data, and Core Web Vitals. These guides give you the systems-level view that turns a crawler report into ranking gains.
21 posts
Why Pages Get Deindexed (and How to Diagnose It with a Crawl)
Hundreds of pages dropped from Google overnight and you have no idea why. Here is what 'deindexed' actually means, the eight causes that explain almost every case, and a 15 minute crawl-based triage to find yours.
The Year in Title Myth and What Core Updates Actually Move
Adding the current year to your title tag is not a ranking signal. This guide walks through what core updates actually evaluate, why some old pages climb back, what Information Gain is, and how to read post-update panic without making it worse.
llms.txt: Do AI Engines Actually Read It?
llms.txt is supposed to feed your content to AI models. The evidence says no major engine fetches it yet. Here is what the proposal claims, what server logs show, and what AI actually uses.
Website Redesign SEO Checklist: How to Replatform Without Losing Traffic
Pre-redesign audit, redirect map, URL structure decisions, on-page signal transfer, staging QA, launch day, and the first 30 days. A complete checklist.
Best SEO Crawlers Compared: An Honest 2026 Guide
Screaming Frog, Sitebulb, Ahrefs, Semrush, Lumar, ContentKing and Seodisias side by side. Pricing, JavaScript rendering, free tiers, and which crawler fits which job.
JavaScript SEO and Rendering: How Search Engines See Your Modern App
How Google and AI crawlers actually render JavaScript, the two wave indexing model, when to choose CSR, SSR, SSG, or ISR, and the patterns that quietly break indexing.
Hreflang Implementation Guide: Three Methods, x-default, and Five Common Mistakes
How to implement hreflang correctly for multilingual sites. The three placement options, the x-default tag, the relationship with canonical, and the five mistakes that quietly break it.
Core Web Vitals in 2026: LCP, INP, CLS, and What Actually Moves Rankings
Core Web Vitals decide how fast your site feels to real users. Learn what LCP, INP, and CLS measure in 2026, lab versus field data, and the playbook that fixes each.
Internal Linking as a Crawl Budget Tool: Patterns, Anchors, Audits
Internal links shape what crawlers see, how often, and in what order. Learn the patterns that prevent orphans, control link depth, and survive site growth.
XML Sitemaps at Scale: Build, Split, and Validate Without Quiet Errors
An XML sitemap tells crawlers which URLs you want indexed. Learn the spec, the 50,000 URL split rule, what belongs in or out, and how to validate yours.
The Complete Guide to robots.txt: Rules, Examples, and AI Crawlers
robots.txt controls what search engines and AI crawlers can access. Learn the syntax, common patterns, and how to handle GPTBot, ClaudeBot, and PerplexityBot.
Canonical Tags Explained: Stop Duplicate Content Hurting Your Rankings
Canonical tags tell search engines which URL to index when duplicates exist. Learn how to use rel canonical correctly and avoid common mistakes.
Best SEO Crawlers in 2026: Free, Open Source, and Commercial Tools Compared
Compare free, open source, and commercial SEO crawlers. What each catches, when each wins, and how to pick the right tool for your site in 2026.
What Are Redirect Chains and How to Fix Them
Redirect chains slow down crawling, waste link equity, and confuse search engines. Learn what they are, why they happen, and how to find and fix them.
Schema Markup for SEO and AI Search: A Practical Guide
Learn what schema markup is, how to add structured data to your pages, and why it matters for both Google rankings and AI search citations.