Marketing attribution accuracy refers to how precisely you can link a sale back to the specific ad or campaign that caused it. Accuracy has plummeted recently because browsers like Safari now delete tracking cookies in as little as 24 hours. This makes a returning customer look like a “new” visitor, breaking the attribution chain. To restore marketing attribution accuracy, businesses are turning to server-side tracking to extend cookie life and use first-party identifiers (like hashed emails).

This ensures that if a user clicks an ad today but buys next week, the credit still goes to the correct campaign. It’s the difference between guessing which ads work and knowing for certain which ones drive growth