Semrush

The Keyword Gap tool is a competitive analysis feature within the Semrush platform that allows users to compare their own keyword profile against those of their competitors. The primary function is to identify both shared and unique keywords that any given domain, subdomain, folder, or exact URL ranks for in search engine results. Users begin by entering their own root domain and specifying up to five competitor domains. The tool then processes organic keyword data from Semrush’s extensive database, which is updated regularly to reflect current search rankings. After the comparison runs, it returns a structured list of keywords categorized into several intersection groups: keywords that all compared domains rank for, keywords that only the user’s domain ranks for, keywords that only specific competitors rank for, and so on. This segmentation helps users pinpoint gaps in their keyword coverage—terms that competitors are capturing but the user is not—and also reveals opportunities where the user has a unique advantage. The tool supports filtering by keyword type: users can toggle between organic search keywords, paid search (PPC) keywords, and product listing ad (PLA) keywords. They can also mix these types to analyze how organic and paid efforts intersect. For example, a user might discover a set of high-volume keywords that competitors dominate organically but do not bid on, suggesting a PPC opportunity. Conversely, they might find keywords where the user’s paid ads appear but organic presence is weak, indicating a content development need. The output includes numeric data such as keyword volume, keyword difficulty, and CPC estimates for each term. Users can export the list for further analysis in spreadsheets or directly integrate it with other Semrush tools like the K