Direct Answer Impressions are no longer a credible consumer PR metric — they count theoretical exposure, not outcomes. Four measures replaced them: coverage quality, share of conversation, Share of Model, and contribution to demand. Share of Model — the percentage of AI-engine answers in a category that name the brand — is the fastest-rising metric in consumer PR.
The four metrics that replaced impressions
Metric | What it measures | Why it replaced impressions |
Coverage quality | Relevance, prominence, message accuracy | Counts impact, not volume |
Share of conversation | Brand's presence vs. competitors in category discussion | Comparative, therefore honest |
Share of Model (SOM) | % of AI-engine answers in the category naming the brand | Measures AI-era discovery directly |
Contribution to demand | Branded search lift, direct traffic tracked to PR activity | Connects PR to the business |
Why Impressions Failed
Impressions measured how many people could theoretically have seen a mention. They never proved that someone actually saw it, engaged with it, or that it influenced any meaningful outcome.
The metric persisted largely because it was easy to report — not because it reliably measured impact.
Share of Model — The Defining New Metric
Share of Model (SOM) asks a different question:
When a shopper queries an AI engine about a category, what percentage of answers mention the brand?
Unlike impressions, SOM focuses on visibility at the moment of discovery.
Its value comes from three characteristics:
Measurable through structured prompt testing
Comparative against competitors within the same category
Aligned with modern discovery behavior, tracking the AI-driven stage that increasingly sits at the top of the consumer funnel
As AI-assisted discovery grows, the question shifts from how many people could have seen the brand to whether the brand appears when AI recommends options in the first place. Measuring SOM is the method covered in How to Audit Your Consumer Brand's Presence Inside AI Engines.
On Contribution to Demand
Contribution to demand connects PR activity to business outcomes by looking at signals such as:
Branded search lift
Direct traffic growth
Consideration movement tracked alongside PR activity
It is not the same as last-click attribution and should not be presented as such.
Instead, contribution to demand acts as directional evidence that a PR program is influencing awareness, consideration, and brand movement over time.
FAQ
Are impressions still used in PR reporting?
Some agencies still include them in reporting, but impressions measure theoretical exposure rather than actual outcomes. More mature PR programs increasingly rely on metrics tied to impact and visibility.
What is Share of Model?
Share of Model (SOM) measures the percentage of AI-engine responses within a brand's category that mention the brand. It serves as a direct measure of visibility in the AI-driven discovery era.
How is Share of Model measured?
Share of Model is measured through a structured, repeatable prompt test across major AI engines. See the AI Visibility Audit methodology for the measurement framework.
Related: What a Consumer PR Program Costs · How to Audit Your Consumer Brand's Presence Inside AI Engines · Why ChatGPT Recommends the Same Six Consumer Brands
