Google.com Adwords or Pay Per Click Advertising:

Google's Adwords is a Pay per click program which allows you to put ads on Google.com Search Result Pages. You choose a set of keywords for which you wish to display the ad, set your budget. And, your ads start showing up on google.com.

A good place to find out what keywords are good: Click Here its free word tracker tool which will show you search numbers for the keywords you want to bid on. To start with your adwords campaign Click Here.

Before, you proceed with your google adwords campaign. Keep in mind, it will require you to pay the money. So, go slow in the starting. Make sure you don't make a big hole in your pocket.

Google Sign-up demo

Google Account Navigation

Google Bidding and Ranking

Google Keyword Matching Options

Google Optimization Tips

Understanding Conversion Tracking