CPC or Cost Per Click is a Form of Advertising Network Simply made Only to Advertisers Who Want Clicks and Conversion to their Website.

CPC Network is Based on Charges That is Directly Billed To Advertisers based on the Number of Visitors that Clicks Their Banners Or Link.
CPC Network Does not Count The Number of Impressions on a Site But the Number of Clicks That is directed to the Advertisers Website.

Cost per Click Advertising is Mostly Used in Advertising Network like Google Adword, Media net and AdSense.
The Advertising Campaign of CPC is Set on A Daily Budget, Whenever the Limit is Reached for the Day, The Ads will be Paused and When it is Reknewned the New Budget Will continue for the Day Payed for.

A Categorical Example is When a Company Sets its Budget to $300 Dollars Per day, Then 3000 Click through @ 10 Cent Each.
Now The Advertisers is Expecting a Total click of 3000 People to its Website.

Generally, Clicks are Determined by the Advertisers and the CPC Advertising Company. Most of the Time, The Payment of Each Click is determined by a Bidding Process or Even Set at a formula Based Method that is Used for Advertisers.

Campaigns on Cost per click can be utilized in several Ways Especially to Maximize and Strengthen the Effectiveness of Advertising.
The Use of Keyword Plays a Vital Role.
if an Advertiser Uses a Positive Keyword for Advertising, a User Who Searches For Positive Keyword Will be paired to Advertiser Who uses Positive Keyword's.

One thing to Note During CPC Advertising Network is Keyword. Advertisers Are always Advised To Use the Perfect Keyword for their Product and Service when Advertising.