Click fraud can be committed by bots, fake users, or malicious humans clicking on your ads with no intention to purchase.
The Click Fraud Threshold means how many times are we allowing an IP to click on our ads before blocking them. Each IP that meets the threshold criteria will be detected as a suspicious IP and also will be blocked.
The power to decide how many times an individual IP can click on your paid ads before being automatically blocked is in your hands - but how can we find that fine line that is between a potential fraudster and an innocent visitor? Great question!