AI Search Metric
Clicks per search
Also known as: CPS
Clicks per search is the average number of outbound clicks a search generates, calculated as total clicks divided by total searches. Unlike click-through rate, which is measured against impressions for a single result, it describes how much onward traffic a whole search produces. It is used to discuss whether answer-led interfaces send more or fewer visits per query than a traditional results page.
What it is
The metric treats the search, not the listing, as the unit of analysis. A search that produces no click has a value of zero, and a search where the user opens three results has a value of three, so the average captures both abandonment and multi-click behaviour. Platform-wide figures are only available to search providers, so external practitioners work with approximations.
Why it matters
If assistants and AI answers satisfy more queries in place, clicks per search falls even when query volume grows, and site owners feel that as flat or declining traffic against rising visibility. Tracking the concept helps teams explain the gap between being cited and being visited, and shifts planning towards value per visit rather than volume alone. It also frames the case for content that needs a click to be useful, such as tools, pricing and configuration.
How it works
For their own property, teams approximate it by comparing clicks from a source against a measure of the demand behind them, such as tracked query volume or panel estimates, then watch the ratio over time rather than the absolute number. Search Console clicks and impressions give a per-listing view, so many practitioners build a proxy by segmenting queries into answer-prone and click-prone groups and monitoring how each behaves. Conclusions are treated with care because the denominator is always an estimate.
When it applies
It applies when analysing the traffic effect of AI answers and assistants, when visibility is stable but sessions are falling, and when setting expectations with stakeholders about traffic per unit of demand.
Examples
- An ecommerce team splits queries into informational and transactional sets and finds the informational set now yields far fewer sessions for the same tracked demand.
- A publisher reports clicks alongside estimated query volume each month to show how much onward traffic each search produces.
- A B2B site moves its target from sessions to qualified enquiries after accepting that clicks per search is falling across its topic.
How it is measured
- Clicks divided by estimated query volume for a defined query set
- Clicks per thousand impressions by query intent group
- Trend in sessions against trend in tracked keyword demand
- Conversion rate and revenue per session, to track value as volume shifts
Related terms in AI Search Metric
- AI visibilityAI visibility is how often and how prominently a brand, product or website appears in answers generated by AI assistants and AI search features. It is measured by mentions, citations and the quality of the description, not by keyword rankings. It is the AI search equivalent of share of voice on a results page.
- AI-referred trafficSessions referred from ChatGPT, Claude, Gemini, Perplexity, Copilot, and other LLM surfaces. Often under-counted in standard analytics because referrers are stripped or labelled as direct.
- Answer attribution rateThe proportion of AI answers that explicitly link back to source pages versus those that summarise without attribution. Attribution rate varies materially by platform and query type.
- Bounce-back rate (AI surface)The rate at which users return to the SERP or refine the prompt after seeing an AI Overview. Google's internal signal that an Overview failed, high bounce-back is associated with Overviews being silently removed for that query cluster.
- Brand mention rateThe frequency at which an LLM mentions a brand by name in answers across a prompt set, with or without citation. Brand mentions without citation are an early indicator of model-internalised brand awareness.
- Citation depthHow early in an AI-generated answer a source is cited. Earlier citations correlate with higher click-through from AI surfaces and stronger user trust signals.