What is Adwords?
Since Google has launched its Adwords ( Paid Search or Sponsored search option for advertisers) the popularity and ROI graph is increasing consistently for its pay per click (PPC) service.
How are adwords and adsense connected?
Website owners attract content match advertising via adsense which in turn triggers from shared revenue of Adwords.
Which are the top online advertising programs?
Google (adwords and adsense), Yahoo (search marketing; formerly Overture) and MSN (adcenter) offer biggest online advertising options for advertisers for sponsored search with the results and on the sites tied up in the content and search network.
AOL has an Google adwords inspired interface for ease of operations.
Many affiliate programs are also a good option if you want to do something out of the box.