Keyword Gap

Keyword gap analysis is usually run with a dedicated tool feature (most major SEO platforms have a built-in 'keyword gap' or 'content gap' comparison) that cross-references multiple competitor domains at once against a target site, surfacing the keywords where competitors rank and the target site is entirely absent. Not every gap is worth filling — the output needs a second filtering pass for search volume, topical relevance to the actual business, and realistic ranking difficulty given the site's current authority — since a raw gap list from several competitors can easily surface hundreds of tangential or low-value terms alongside the genuinely important ones. Gaps found across multiple competitors simultaneously (not just one) are generally a stronger signal of real, validated demand worth prioritizing.

Example

A keyword gap analysis against four competitors surfaces 'keyword cannibalization checker' as a term all four rank for and the target site doesn't — confirmed as a genuine gap worth building a dedicated page around.

Related terms

• Content Gap Analysis
• Competitor Analysis
• Keyword Research
• Keyword Clustering
• Keyword Cannibalization
• Search Volume