Facebook

• Facebook is the second-largest website on the Internet, and it has created an ad network to finance its growth. Facebook advertising can be signed up for in one step, and campaigns can be started in less than five minutes. An advantage Facebook has over AdWords is that ads can be targeted to demographics, such as gender, relationship status and hometown, thanks to the information Facebook has about its users. Ad programs are organized into campaigns and can be canceled at anytime.
  
  

AdCenter

• AdCenter is Microsoft's ad network. It allows you to show ads on the Bing and Yahoo! search network. Microsoft will train you how to use the network if you are unfamiliar with pay-per-click advertising. AdCenter provides you with a customizable dashboard and notifies you if you go over your monthly budget. The dashboard can be changed to highlight performance metrics, such as a conversion rate, how much you are paying per click or your click-through rate.
  
  

Yahoo!

• Yahoo! has advertising programs separate from their alliance with Bing. The Yahoo! advertising program distinguishes itself from adCenter by giving advertisers better targeting of consumer demographics, product placement and increased priority on Yahoo!-affiliated sites. Demographic targeting by the Yahoo! advertising network includes niche demographics, such as baby boomers, parents and men and women in specific age groups. Ads can be displayed over mobile phones, search engines, chat and video websites. Yahoo! affiliates include their sites in maps, chat, real estate and Yahoo! answers.
  
  

ClickBank

• ClickBank is an advertising platform that specializes in digital products like e-books. Someone who wants to write an e-book or other digital download can upload it onto ClickBank, and webmasters can choose to have advertisements for ClickBank products displayed on their sites. ClickBank affiliates receive a commission every time a product is sold. Commission rates can be as high as 75 percent. ClickBank pays every week and supports digital products in French, Spanish and German.