Glossary · Glossary

Noindex

Noindex is a directive that asks search engines not to include a page in search results.

Updated Jun 3, 2026 Reviewed Jun 3, 2026 en

Noindex is a directive that asks search engines not to include a page in search results. It is most often delivered through a meta robots tag in the page HTML or an X-Robots-Tag HTTP header.

Noindex is useful when a page can be reachable but should not become a search result. It is different from deleting the page, blocking the crawler, or canonicalizing the page to another URL.

Why it matters

Noindex helps maintain a clean public index. Drafts, internal utility pages, duplicate feed pages, thin temporary pages, and review-only routes can confuse users and dilute search quality if they are indexed. A noindex directive lets teams keep a page accessible while telling search systems not to show it as a result.

For Geolyze-style content production, noindex is a boundary tool: published glossary pages should be indexable only after editorial review, while raw notes and incomplete drafts should not enter the sitemap or search index.

How it differs

Meta robots is the mechanism that can carry noindex. Robots.txt controls crawling before the page is fetched. If a page is blocked by robots.txt, crawlers may not be able to see the noindex directive.

A canonical URL is also different. Canonicalization says another URL should represent similar content. Noindex says this URL should not appear in search results.

Example

<head>
  <meta name="robots" content="noindex,follow" />
</head>

This asks search engines not to index the page while still allowing them to follow links on the page. The exact behavior depends on the crawler, but the intent is clear.

For a non-HTML file or route, the same instruction can be sent as a header:

X-Robots-Tag: noindex

How teams use it

Teams use noindex when a page should remain available for users, reviewers, or special workflows but should not be a search result. Common examples:

Page type	Why noindex may fit
Internal search results	Often low-value and duplicative for search users
Review pages	Useful internally but not ready for public discovery
Duplicate printable pages	User utility, not a separate search target
Temporary campaign pages	May expire before becoming durable content

Common misunderstanding

Noindex is not a cleanup substitute for weak content. If a public page should rank, improve or consolidate it. If it should not exist publicly, remove or protect it. Use noindex when the page has a legitimate public or operational reason to remain reachable without being indexed.