Viewability fraud happens when your banner ads are shown in ways that real people never see them, like hidden behind other elements or loaded on invisible pages. This kind of fraud makes it look like your ads are getting impressions, but no one is actually viewing them. The problem is you end up paying for fake views, and that reduces your earnings since there’s no real chance for conversions. It also affects your campaign data, making it harder to measure what’s really working. Keeping an eye on viewability reports and using trusted ad networks can help reduce this issue. Has anyone here seen a drop in ROI from this kind of thing?