Enhanced conversions is a Google Ads feature that sends hashed first-party data, such as an email captured at conversion, to match more conversions to ad clicks. It recovers measurement lost to cookie limits and improves Smart Bidding.
What it fixes
Browser and cookie restrictions mean Google cannot always tie a conversion back to the click that drove it, so reported conversions undercount. Enhanced conversions sends securely hashed first-party data from your site or CRM, which Google matches to signed-in users, filling the gap without exposing raw personal data.
Why it matters for bidding
More matched conversions means a cleaner signal for Smart Bidding, which optimizes to the conversions it can see. Thin or degraded measurement is a common hidden cause of rising CPA, so recovering conversions can improve delivery even without changing bids. It pairs with Consent Mode and a solid tagging setup.