Attribution Window
The time period during which a conversion can be credited to an ad interaction.
1 min readLast updated Apr 2026
Quick Reference
CategoryMarketing & Paid Advertising
Related Terms2
The time period during which a conversion can be credited to an ad interaction.
Why It Matters
Attribution windows directly determine how conversions are counted and which campaigns get credit. Setting the right window affects reported ROAS, optimization decisions, and budget allocation. Windows too short miss real influence; too long, and you credit irrelevant touchpoints.
Practical Example
Scenario
A brand tests 7-day vs 28-day click attribution on Meta. 7-day shows 2.5x ROAS; 28-day shows 3.8x ROAS.
Result
The additional 1.3x comes from conversions 8-28 days post-click. For their impulse-buy product, those late conversions may not be truly influenced by the ad.
Pro Tips
- 1Match attribution window to your actual purchase consideration period—check time-to-purchase data
- 2Use consistent windows across platforms when possible for apples-to-apples comparison
- 3Shorter windows generally mean more accurate attribution but lower reported volume
Common Mistakes to Avoid
Using platform defaults without considering whether they match your business reality
Comparing campaigns with different attribution windows as if they're equivalent