> ## Documentation Index > Fetch the complete documentation index at: https://docs.shareofmodel.ai/llms.txt > Use this file to discover all available pages before exploring further. # Ad Presence Rate > Measure how broadly an advertiser domain appears across the ad-supported prompts you track. Advertisers don't participate equally across every prompt where advertising appears. Some advertiser domains are present across a broad range of user needs, while others concentrate their paid presence around fewer prompts. **Ad Presence Rate** measures how much of your ad-supported prompt territory is occupied by a given advertiser domain, making it an indicator of **paid visibility breadth**. Rather than counting how many ads an advertiser generates, it measures **across how many ad-supported prompts the advertiser is present**. ## How Ad Presence Rate is calculated Ad Presence Rate represents the proportion of ad-supported prompts where a given advertiser domain is present. The calculation is: > **Ad Presence Rate = Ad-supported prompts where the advertiser is present รท Total ad-supported prompts** The metric is expressed as a percentage (%). The denominator always corresponds to the **ad-supported prompts within the current analysis scope**. If you apply filters such as engines, date ranges, themes or topics, the eligible prompts are recalculated accordingly. > **Example** > > If 40 prompts generated ads within your filtered analysis and an advertiser domain appears across 10 of them, its Ad Presence Rate is **25%**. ## How to read this KPI A higher Ad Presence Rate means the advertiser is present across a larger proportion of the prompts where advertising occurs. It measures **breadth of paid presence**, not advertising volume. An advertiser can therefore have: * a **high Ad Presence Rate**, meaning it appears across many ad-supported prompts; * or a **lower Ad Presence Rate**, meaning its presence is concentrated across fewer prompts. The advertiser is evaluated at **domain level**, based on the advertiser domain retrieved from the ad. ## How this KPI fits with other signals Ad Presence Rate complements: * **Share of Ad Voice** โ€” measures how much of the total paid visibility an advertiser captures. * **Total Ads** โ€” measures the raw volume of ads associated with the advertiser. * **Ads + Organic / Ads Only** โ€” qualifies whether that paid presence overlaps with organic visibility. Together, these signals let you distinguish between **broad advertiser coverage, concentrated advertising volume, and the role paid visibility plays alongside organic presence**. ## What's next How much of the observed paid visibility an advertiser captures. How paid presence interacts with organic visibility. Where Ad Presence Rate can be compared across advertiser domains.