What it means
Instead of manual bids, you hand the algorithm an objective: hit a Target CPA, hold a Target ROAS, or maximise conversions within a budget. It then adjusts bids in real time per auction using signals a human never could.
Why it matters
Smart Bidding usually beats manual once you have enough conversion volume — but it is only as good as the signal you feed it. Clean conversion tracking, accurate values, and CAPI matter more than ever, because the machine optimises toward whatever you tell it is valuable. Garbage in, expensive out.