Content gap is the set of topics, queries, or subtopics where your competitors appear in search results and you don't. It's the inverse of ownership status — instead of "where do I own ranking?", it's "where am I missing entirely?"
Three flavors of gap:
- Topical — an entire cluster of related queries you have no presence on
- Query-level — specific high-intent queries where competitors rank and you don't
- Format — you have written content but competitors have video/interactive/structured-data versions that AI engines prefer to cite
Not every gap is worth filling. Some gaps reflect topics outside your topical authority — chasing them just dilutes the authority you have.
Why it matters for AEO
AI engines aren't crawling the web fresh on every query — they assemble answers from sources they already trust. If your competitors are the sources cited in answers to queries that should be yours, the gap isn't just SEO loss, it's an AEO loss too.
The mental model: every cited competitor on a relevant query is a missed opportunity to be the cited source on that question yourself.
What b/cited does about it
- Cluster discovery surfaces topics adjacent to your existing strong clusters that show competitor activity but no b/cited coverage
- Quick wins view highlights query-level gaps with high impression potential and low position barriers
- Briefs generate from the gap data, producing content angles aimed at queries you should win but currently don't
The fastest path forward is usually filling adjacent gaps — topics within an existing cluster — rather than starting new clusters from scratch.