PPC stands for pay-per-click, a model of internet marketing/advertising where advertisers pay a fee each time one of their ads is clicked. Essentially, it's a way of using paid visits rather than organic traffic sources to your website.

Search engine advertising is one of the most popular forms of PPC. 

Please note: Paid traffic, specifically in search engine advertising has the goal of getting engaged traffic and converting them into a customer.

You are still trying to help out users, not just your page views.

A customer doesn't always mean you are trying to get them buy something. The definition of a conversion varies from site to site.