'When multiple ads are delivered to the same page or app, but are intentionally hidden e.g. impossible for the user to see them - they are considered invalid ads.'
|Classification||Sophisticated Invalid Traffic|
|Registering multiple clicks from the same user at the same time on multiple campaigns|
|Some fraudsters split this traffic over campaigns from different networks to evade detection. In these cases, time to install will have a flat distribution|
|Fraud Tactics||Ad Stacking|