Pay-per-click search engines

online advertising platform owned by Google

Ask.com (known originally as Ask Jeeves) is an answer engine, e-magazine, and former web search engine, operated by Ask Media Group. It was conceptualized and developed in 1996 by Garrett Gruener and David Warthen, based in Berkeley, California.

certification program for Bing/Microsoft partners at Bing Ads services

internet advertising service provided by Yahoo