The ad fraud ecosystem: who gets paid for your impressions, and why Google does not stop it entirely

This lesson is free — you only need your account

The players in ad fraud (site farms built for ads, apps living off accidental clicks, bots and non-human traffic, competitor clicks, proxies), how they make money out of your budget, what Google detects and refunds as «invalid traffic» and what it does not, and why the defence is the advertiser's responsibility.

The account is free, no card needed, and unlocks the whole Basic training, part of the Intermediate and Advanced levels, plus the ebooks and the free scripts.

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