Traditionally, content gaps were found through keyword research or support ticket reviews. Docs AI chatbots surface them directly: unanswered questions show where readers needed help. Some indicate missing content; others reveal retrieval or configuration problems.
Review the questions, group recurring topics, and check them against the published documentation. Frequency helps prioritize work, alongside the importance of the topic and the effort needed to fix it.
A grounded chatbot is a prerequisite. An assistant that guesses instead of saying "I don't know" hides the gaps it should be reporting. Biel.ai logs unanswered questions as content gaps for exactly this reason.