PPC you only pay if the user actually engaged with the ad Who defines that "engagement" legitimately occurred? The ad network. Example: TVguide.com/listings.

PPC you only pay if the user actually engaged with the ad Who defines that "engagement" legitimately occurred? The ad network. Example: TVguide.com/listings. On most devices, I get a nondismissable audio ad when I'm looking at telecast schedules. I kill the audio immediately. I never experience the bulk of the ad, and even if I can identify the product being advertised, I'll form a strongly negative impression of them. I don't count this as "engagement", but it's charged as that.