Contextual Advertisements are the ones which dynamically appear in a webpage. It’s not like you selling you webspace and keeping a static permanent link. Once a page is loaded the advertisement programs scans the entire page and attempts to find the Hot Keywords in the page and displays advertisements based on that keyword on the page. The ads may be either placed in the webpage or it can be either a popup based on the publisher program you are using.

Related Reading :

• Wikipedia Contextual Advertising
• Four Types of Contextual Advertising

Major Contextual Advertising Programs

• MSN adCenter
• Google Adsense
• Adbrite
• Yahoo! Publisher Network (YPN)
• Chitika
• eBay AdContext