Pay per click (PPC) is an Internet Advertising model used to direct traffic to websites, where advertisers pay the publisher when the ad is clicked.
With search engines, advertisers typically bid on keyword phrases relevant to their target market.
PPC is also sometimes referred as Search engine marketing (SEM), but here @ Digismith we consider SEM to be a combination of PPC & SEO.
Most Popular PPC Networks:
Google : The biggest search engine with more than 2 billion searches every day and about 300 million users
Bing & Yahoo : The fusion of the two biggest search engines after Google has created a powerful new choice in search
Facebook : With over 500 million active users worldwide, you can filter the exact audience you would want to reach.