There are multiple sides of Internet Advertising; the Advertisers, Publishers, and the Customers. Advertisers pay the Publishers display ads, and Customers click the ads to buy products. If you want relevant, good quality traffic, and make some money with your website, the top 3 players in the web advertising industry are Google, Yahoo and Microsoft Ad Center.
- Google Adwords - Google charges you $$ to show your ad on Google
- Google Adsense - Google pays you to put ads on your web pages
- Yahoo Search Marketing - You pay $$ to display your ads on Yahoo
- Yahoo Publisher Network - Yahoo pays you to put ads on your website
The are others out there, but Google, Yahoo and Microsoft are the top 3.






