PPC stand for Pay Per Click. You need to pay for every click you are receiving on your ads

PPC is different than SEO, it is paid service offered by google, in PPC google charge a fix amount for per click.

In simple way, pay per click (also called cost per click) is an internet advertising where advertisers pay to publishers when advertisers get visitors.

PPC is called pay per click in an online world, it is a way to get traffic to your website by paying some amount to google if anyone clicks on your ads