# Technical SEO

> Technical SEO articles: indexing, canonicals, redirects and robots rules, each explained with the evidence an audit actually reads from the page.

Canonical: https://crawlwise.site/blog/technical-seo

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Technical SEO articles: indexing, canonicals, redirects and robots rules, each explained with the evidence an audit actually reads from the page.

[robots.txt in the wild: what the top 10,000 domains actually serve](https://crawlwise.site/blog/technical-seo/robots-txt-top-10000-domains): Technical SEO Original data: only 1,837 of 10,000 popular domains served a robots.txt a crawler could read as one.

[noindex vs robots.txt disallow: which one removes a page from Google?](https://crawlwise.site/blog/technical-seo/noindex-vs-robots-txt-disallow): Technical SEO Disallow stops crawling. noindex stops indexing. Using both at once means Google never reads the noindex.

[Canonical tags: why Google treats rel=canonical as a hint, and the mistakes that make it ignore yours](https://crawlwise.site/blog/technical-seo/canonical-tags-how-google-treats-them): Technical SEO A canonical tag is a hint Google weighs against redirects, links and sitemaps. Make every signal agree.

[Redirect chains and loops: 301 vs 302 vs 308, and how many hops is too many](https://crawlwise.site/blog/technical-seo/redirect-chains-301-302-308): Technical SEO Use 301 or 308 for permanent moves, redirect straight to the final URL, and keep any chain under five hops.

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