Presence rate

Presence rate asks the most direct visibility question. In what fraction of answers do you show up at all, wherever you land?

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. That is a measured answer, not "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 multiplies presence rate by a prompt's volume band. That approximates how often a real user would have seen you mentioned.
• It is the easiest metric to move first. Being mentioned somewhere comes before 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.