The term PCC stands for Pay- Per- Click. PCC is an online advertising model in which advertisers pay each time a user clicks on one of their online ads. It is a model of internet marketing. PCC works on Google ads, search ads, local search ads, display network, pre- roll ads, social PCC ads, Facebook ads, Instagram ads, YouTube ads, LinkdeIn ads, remarketing or retargeting and many more. It is the most used platform.
PPC is an acronym for "pay-per-click." It's a marketing system where you only pay if your advertisement is clicked on. The advertiser pays the publisher when the user clicks on the link to their website.
In other words, it's a system where advertisers only pay for results, not traffic. You set up an account with Google Adwords, Yahoo! Search Marketing or Bing Ads and place advertisements on relevant websites and in online magazines as well as via sponsored tweets (Twitter). When someone clicks on your ad - that's when you pay.