Every time someone clicks your ad, you pay. Most clicks are real people. Some aren’t: bots, click farms and software that clicks ads automatically.
Not every click that doesn’t buy is a bot, though. Often the ad is just reaching the wrong people. The hard part is telling the two apart, because your ad account only shows clicks, not who made them.
Skyfense sees what happens after the click, on your store. That’s where you can tell a real shopper from a bot, so you know whether to fix your ads or block the fakes.