A keyword gap is the difference between the searches your competitors rank for and the ones you rank for. Keyword gap analysis compares domains in an SEO tool to list those searches, so you can spot topics, page types and buyer questions you have not yet covered. The output is a list of candidates, not a to-do list: each gap still needs to be checked for relevance and business value.
How gap analysis works
Most SEO tools offer a comparison feature: enter your domain and a few competitors, and the tool lists keywords where competitors rank in its index and you do not. You can usually filter to keywords where several competitors rank, which is a stronger signal that the topic matters in your market.
The data depends on the tool's own index of rankings, which samples a subset of searches and estimates positions. Small, specific B2B searches are often missing, so the gap list will be incomplete.
Choosing the right competitors
Business competitors and search competitors are not always the same. A large publisher or review site may rank for many searches in your space without selling anything comparable. Include them if they compete for your buyers' attention, but read their gaps with that in mind.
Filtering the gaps
A raw gap report can run to thousands of rows. Cut it down quickly by removing irrelevant and low-value searches, then group what remains by intent.
- Remove competitor-branded terms you cannot or should not target
- Remove topics unrelated to your product or audience
- Group the rest by intent and page type
- Score each group by business value, then by how winnable it looks
- Check which gaps your existing pages could close with an update
Gaps beyond keywords
The most useful gaps are often page types rather than individual keywords. If every competitor has integration pages and you do not, or they all have pages for specific industries, the gap is structural. Closing it can cover many searches at once.
The same idea applies to AI answers: if assistants consistently mention competitors for a question and not you, that is a visibility gap worth investigating, though the tools to measure it are still young.
Example
A structural gap
A made-up data pipeline company, Pipewell, runs a gap analysis against three competitors. The report shows many keywords of the form “[source] to [destination] integration”.
Rather than writing one article per keyword, the team sees the pattern: competitors have a page for each connector. They build a templated integration page for each connector they actually support, with real setup steps, which closes the gap in one structured project.
Common mistakes
Copying a competitor's whole keyword list
Competitors rank for searches that may not fit your product or buyers. Filter for relevance and value before adding anything to the plan.
Trusting the report as complete
Tool indexes miss many small B2B searches. Combine gap analysis with customer research and Search Console data.
Questions
Three to five is usually enough. Include direct competitors and any sites that consistently rank for your most important searches.
A few times a year is typical, or when a competitor launches a new content push or product area.
