Viewable Impression [VI]

Viewable Impression (or VI), which means an ad impression that was actually seen by a user (as opposed to an ad which was loaded onto a page below the fold and never seen by anyone). Usually at least 60% of an ad has to be on screen for an ad impression to count as a viewable impression.

Author: Justin Driskill

Justin is the founder of The Online Advertising Guide and a freelance Digital Projects Manager.

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