First-Party Data & Google Ads 2026: Activating Your Customer Data

First-Party Data & Google Ads: The New Major Challenge

With the complete disappearance of third-party cookies in 2025, first-party (1P) data has become the primary targeting lever in Google Ads.

Customer emails (CRM, newsletter)

On-site behaviors (GA4)

Offline sales data

Customer phone numbers

Upload your customer list (min. 1,000 contacts) into Google Ads via Audience Manager.

Typical match rate: 50-70% of emails

Benefits: higher bids on existing customers, exclusion of already-converted customers

Enhanced conversions send hashed conversion data directly to Google.

Result: +15% to +20% more tracked conversions on average.

CRM → Customer Match (remarketing + lookalike)

GA4 → behavioral audiences → Google Ads import

Enhanced conversions → better tracking

Offline conversion import → qualified lead value

Accounts that have activated all 4 steps see on average +28% ROAS vs. accounts without 1P data.