Glossary · Indexing and discovery

X-Robots-Tag

An HTTP header carrying indexing directives. Invisible in the page source, which is why a page can look perfectly indexable in a browser while being excluded.

Indexing and discovery

Whether a page can be found and kept, separately from whether it can be fetched.

index coverage · canonical · noindex · orphan page · E-E-A-T · E-E-A-T proxies · topical authority · Soft 404 · case consistency · accessibility structure · landmark region · accessible name · skip link · main landmark · alt attribute · form control name · duplicate id · IndexNow · faceted navigation

← noindex  ·  orphan page →

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