Indexing

Indexing of content in search engine result documentation

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"noindex" directive

The noindex directive tells search engines: "you can crawl this page, but don't include it in the index." A page with noindex won't appear in search results, even if it's perfectly accessible to users and crawlers. It's the standard tool for keeping [...] Read more

4 min

404 pages

A 404 page is what a web server returns when someone requests a URL that doesn't exist. Beyond just informing users, the "404" HTTP status code serves a specific purpose in telling search engines the requested page does not exist. Why 404s happen A [...] Read more

2 min

Page indexing

Indexing is the process by which search engines store and organise web pages so they can be retrieved in response to search queries. A page that is indexed can appear in search results. A page that is not indexed cannot — no matter how good its [...] Read more

4 min

4xx errors

4xx HTTP status codes are a server's way of saying "your request can't be delivered" — meaning the request itself was wrong, blocked, or unauthorised. They're distinct from 5xx errors (server problems) and 3xx codes (redirects). Common 4xx codes 400 [...] Read more

2 min

Query strings

A query string is the part of a URL that carries extra information to a web server, typically to filter, track, or modify what the page displays. It's the section that appears after the question mark (?). Anatomy of a query string Take this example: [...] Read more

3 min

Canonical links

A canonical tag tells search engines which version of a URL is the "main" one when multiple URLs serve identical or near-identical content. It lives in the <head> of a page: <link rel="canonical" [...] Read more

3 min