The Best CPC or PPC Ad Networks for Publishers:

Taboola is a web-based platform that aims to solve the problem of the online content industry. Taboola's motto, "content you may like," says a lot about the company's business strategy. Taboola's principal business is recommending and linking users to sites that may be of interest to them.

Google AdSense is a contextual advertising network that helps publishers monetize their websites with global fills. It offers one of the best CPC rates for niche blogs and websites. AdSense is the go-to advertising network for all entry-level publishers. 

RollerAds is an ad network that specializes in push notification advertisements in order to provide advertisers with the best affiliate marketing methods and direct publishers with high website revenue. It is a recently launched advertising network that focuses on push notifications, a high-performance ad style.