ImpressionsHow many times your ads were shown.
Click-through rate (CTR)Clicks divided by impressions. A guide to how relevant the ad is to the search.
Average CPCThe average amount paid for a click. Set by auction, so it rises with competition.
Search impression shareImpressions received divided by the estimated impressions you were eligible for.
Lost impression share (budget)Share of eligible impressions missed because the budget ran out.
Lost impression share (rank)Share missed because Ad Rank was too low, usually from bids or quality.
Quality ScoreGoogle’s 1–10 rating of expected CTR, ad relevance and landing page experience for a keyword.
Negative keywordA word or phrase that stops ads showing for irrelevant searches.
Conversion rateEnquiries divided by clicks, or by sessions for a web page.
Engaged session (GA4)A visit lasting over 10 seconds, with a key event, or with two or more page views.
Key event (GA4)An action marked as important, such as a form submission or a call click.
Cost per booked jobAd spend divided by jobs won from those enquiries.
ROASReturn on ad spend: revenue divided by ad spend. 3.0x means $3 of revenue per $1 spent.