Ad fraud encompasses any deliberate activity that prevents the proper delivery of ads to real human users. It includes bot traffic, click farms, pixel stuffing, ad stacking, and domain spoofing. The industry loses an estimated $80+ billion annually to ad fraud.
Common Types
- Click fraud: Bots or humans clicking ads to drain budgets
- Impression fraud: Generating fake impressions via bot traffic
- Pixel stuffing: Loading ads in 1×1 pixel iframes
- Ad stacking: Layering multiple ads on top of each other
- Domain spoofing: Misrepresenting low-quality sites as premium publishers
How to Protect Yourself
- Use fraud detection tools (DoubleVerify, IAS, Pixalate)
- Monitor for abnormal CTR patterns and suspicious traffic sources
- Prefer brand-safe, verified inventory
