Answer Coverage

Answer coverage measures how much of your defined target prompt set the AI actually mentions you in. Pick, say, 50 prompts that span recommendation, comparison and how-to questions in your category, and count how many include your brand at least once.

It is useful because it shows a different angle from citation rate or share of voice. You can dominate citations on a single prompt while staying invisible across the rest of the category. High coverage, on the other hand, locks you into the 'never absent from this category' position.

Designing the prompt set decides the metric. Make it too narrow and you trivially hit 100%; make it too broad and the number is always low. The typical pattern is to bucket prompts by category, buying stage and persona, and refresh quarterly.