Presence rate

Presence rate is the most direct visibility question: in what fraction of answers do you show up at all, regardless of where?

How it's calculated

presence_rate = runs where you appear / total runs in the window

It is a fraction from 0 to 1. Every run in the window is in the denominator, so a run where you weren't mentioned counts against you.

Unlike the other visibility metrics, presence rate is never null — an empty window is a true 0 (you appeared in none of the runs), which is a meaningful, measured answer rather than "no data".

Presence rate vs visibility

• Presence rate is binary per run: were you mentioned, yes or no.
• Visibility weights each appearance by how early it came.

Two brands can share the same presence rate while one is always named first and the other always last — visibility separates them; presence rate does not.

Why it matters

• It is the cleanest input to demand-weighted estimates: estimated impressions on the Overview multiply presence rate by a prompt's volume band to approximate how often a real user would have seen you mentioned.
• It is the easiest metric to move first — being mentioned somewhere is the prerequisite to being mentioned first.

Related

• Visibility — presence plus position.
• Average position — how good your appearances are.
• API: the presence_rate field on /api/v1/overview and /api/v1/prompts.