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Learn technical SEO for URLs
Short, sourced guides to the rules behind the tools: how Google picks a canonical, what each redirect code really does, why chains waste crawling, and how to settle www, slashes and HTTPS once.
relWhat is a canonical tag?Examples, self-referencing canonicals, canonical vs noindex, and how Google weighs the signals.3xx301 vs 302 vs 307 vs 308Permanent vs temporary, method preservation, meta refresh and JavaScript redirects.→→Redirect chains and crawl budgetThe 10-hop limit, who actually needs to think about crawl budget, and how to flatten chains./www vs non-www, trailing slashes and HTTPSPick one version of every URL and enforce it in a single hop.
Every claim here links back to Google Search Central or the relevant RFC. When Google's documentation changes, the guides are updated to match.