When advertising in the Google platform, CPC bidding means that an advertiser pays for each click of an ad placed and that, in ad campaign, he can set a price cap as a maximum CPC bid. Here, the CPC pricing is also sometimes referred to as PPC. In the Facebook social networking platform, the term pertains to the average cost for each link click and it serves as a metric in online advertising for benchmarking online ad efficiency and performance. CPC in the Amazon Marketing Service (AMS) follows the same model, although it is reported that this platform charge lower CPCs compared to other advertising platforms with Google charging the highest.