How Smart Bidding Works
Google evaluates auction-time signals—such as the query, device, location, time, audience membership and predicted conversion likelihood—to set a bid. The main Smart Bidding strategies are Target CPA, Target ROAS, Maximize Conversions and Maximize Conversion Value.
A Simple Example
A plumbing campaign can bid more aggressively for a search Google predicts is likely to become a booked job and less for a similar search predicted to be less valuable.
Why Smart Bidding Matters
Smart Bidding can process more auction-level signals than manual rules, but it depends on accurate conversion definitions and enough representative data.
Common Misreading
Automation optimizes toward the data it receives, not necessarily toward profit. If low-quality leads are counted like customers, it can efficiently generate more low-quality leads.
Continue with the practical guide
The glossary gives you the definition. The guide covers implementation and decision-making in more depth.
Compare Google Ads bidding strategies →