Hello there. Time for a little overview on the pay-per-click contextual advertising program that Google offers. First of all, I'll try to explain how the system works. Google is the biggest player in the game of context ads. They have Adwords program. Advertisers build their campaigns, choose keywords and their ads appear in search results like this The search result listed first, with yellow background is the sponsored adwords link. This method of advertising has proven itself very sufficient and effective and it has made Google $rich$. And it also can share it's wealth with you if you use Adsense right :D