In the realm of online advertising, “PPC” stands for “pay-per-click.” This means just what it says . . . you pay the owner of the real estate where your ad is placed (search engine, website, app, etc.) a fee for each click your ad receives. In the offline world, advertisers traditionally pay owners of advertising space based on impressions (typically cost per thousand impressions). This is because it is much harder to tie direct customer actions to specific ads, like if a billboard or TV ad caused someone to go to the store and purchase your product. But since clicks on online ads can be tracked and analyzed, paying per click is a much easier system. Therefore, you will find most ad platforms offering this bidding option as the default (although there are other options to choose from).