Guides

Technical SEO

• How to investigate a website not showing on Google

  Diagnose Google indexing problems using HTTP status, robots rules, canonical tags, rendered content and Search Console. Follow a practical repair checklist.

  Updated 15 October 2026 · 3 min read

• 301 vs 302 redirects

  The difference between 301, 302, 307 and 308 redirects, how search engines treat each, when a temporary redirect is right, and how to avoid chains.

  Updated 6 October 2026 · 5 min read

• Robots.txt guide with examples

  How robots.txt rules are read, copy-ready examples (WordPress, staging sites, AI crawlers), and the mistakes that accidentally block a whole site.

  Updated 6 October 2026 · 6 min read

• Canonical tags explained

  What rel=canonical does, the five signals Google weighs when picking a canonical URL, correct syntax for every case, and the mistakes that deindex pages.

  Updated 6 October 2026 · 4 min read

• Hreflang implementation

  How to annotate language and region versions with hreflang: valid code formats, the return-link rule, x-default, and the three ways to deliver the tags.

  Updated 6 October 2026 · 4 min read

• HTTP status codes for SEO

  The status codes that change how Google crawls and indexes a page: 200, 301, 302, 304, 404, 410, 429, 500 and 503, and what each does to indexing.

  Updated 6 October 2026 · 5 min read

• XML sitemaps: what to include and what to leave out

  How XML sitemaps work, the 50,000-URL and 50 MB limits, why Google ignores priority and changefreq, and which URLs belong in the file.

  Updated 6 October 2026 · 5 min read

• Noindex vs robots.txt: which one blocks what

  Robots.txt stops crawling; noindex stops indexing. Why combining them backfires, how blocked pages still appear in results, and which to use when.

  Updated 15 October 2026 · 5 min read

• Crawl budget: when it matters and what wastes it

  What crawl budget is, the two limits that set it, the site sizes where it actually matters, and the URL patterns that waste crawling on duplicates.

  Updated 6 October 2026 · 5 min read

• Duplicate content: what Google actually does

  There is no duplicate content penalty. Google groups and filters duplicates; the real costs are split link signals, wasted crawling and the wrong URL ranking.

  Updated 6 October 2026 · 5 min read

• JavaScript SEO: how Google renders and indexes pages

  How Googlebot crawls, renders and indexes JavaScript pages, the three-phase pipeline, and the patterns that stop content being indexed.

  Updated 15 October 2026 · 5 min read

• Moving a site to HTTPS

  A step-by-step HTTPS migration: certificates, one-hop redirects, mixed content, canonical and sitemap updates, HSTS, and what to watch afterwards.

  Updated 6 October 2026 · 5 min read