Definition: Post-Impression Window

The Post Impression Window, or PI Window, is the amount of time after a user has viewed an ad and bought the product advertised, that the website the ad was on will still get paid for that conversion if they are being paid on a CPA basis.

Not all advertisers will pay on Post-Impression conversions, as they are difficult to verify. When used, the advertiser will decide the length of the Post-Impression Window.

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