SEO Engine
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Technical SEO, explained from primary sources

A lot of SEO advice is repeated until it sounds true. Everything here is either something you can check against Google’s own documentation — linked at the foot of each piece — or is clearly labelled as our opinion.

301 vs 302: what actually changes

11 August 2026 · 4 min read

The difference is not cosmetic: it decides which of the two URLs Google treats as the canonical one, and therefore which one appears.

Related check in the analysis: Canonical and redirects — temporary redirects used for what look like permanent moves

Google rewrites titles. Here is when, and what to do about it

4 August 2026 · 5 min read

Your title element is an input to the title link, not the title link itself. The commonest trigger for a rewrite is boilerplate repeated across a template.

Related check in the analysis: Metadata — duplicate titles across a template family, missing or thin titles

A canonical tag is a hint, not an instruction

22 July 2026 · 5 min read

Declaring a canonical is not the same as choosing one. Google weighs your declaration against several other signals, some of which you may be sending accidentally.

Related check in the analysis: Canonical and redirects — missing, conflicting or self-contradicting canonicals

robots.txt and noindex are not the same tool

14 July 2026 · 4 min read

Combining the two is the most common way a page gets stuck in search results while appearing, to you, to be excluded.

Related check in the analysis: Indexability — unexpected noindex, and robots.txt rules that contradict them

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