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Home › Resources › Indexability
Reference Library

Indexability

Indexability covers every factor that determines whether a page can be discovered, crawled, and included in search engine indexes. A technically perfect page that is blocked by robots.txt, carries a noindex directive, or has broken canonicals cannot rank — regardless of its content quality.

The checks in this section span the full crawl and indexation lifecycle: from the first HTTP response through robots directives, redirect resolution, canonical declarations, hreflang language targeting, HTML structural requirements, and accessibility compliance. Together they ensure that every page you want indexed is accessible, correctly configured, and unambiguously identified.

Select a topic below to see exactly what the platform checks and how to resolve each class of indexability issue.

Crawl Errors

4xx errors, 5xx server failures, inaccessible pages, broken pagination chains, and blocked resources preventing crawl coverage.

View 8 checks →

Robots Directives

robots.txt configuration, noindex, nofollow, none, and all other meta robots directive variants including obsolete tags.

View 13 checks →

Redirects

Permanent and temporary redirects, redirect chains, loops, long chains, meta refresh, HTTP Refresh, JavaScript, and geo redirects.

View 10 checks →

Canonicals

Missing, broken, mismatched, relative, outside-head, fragment, multiple, and unlinked canonical tags plus redirect and non-200 targets.

View 12 checks →

Site Structure

Orphan pages, deep pages, missing sitemaps, sitemap errors, oversized sitemaps, too many URLs, and crawled URLs missing from sitemap.

View 7 checks →

Hreflang

Missing self-reference, missing x-default, conflicts, return link issues, non-canonical targets, invalid values, and misplaced tags.

View 12 checks →

Language

Missing HTML lang attribute — the document-level language declaration required for accessibility and language targeting.

View 1 checks →

Accessibility

Accessible button names, duplicate IDs, form labels, heading order, table headers, and autoplaying media with SEO implications.

View 6 checks →

Content Quality

Spelling errors and grammar/style issues detected in body content — quality signals affecting search engine content assessment.

View 2 checks →
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