When someone uses a search engine, and are served up sites with the best keyword match, the ads that appear alongside the search results get a lot of eyeballs. And the merchants with these ads pay only if someone interested clicks on them.

How does it all work? Sites first fine-tune and optimize their keyword advertising. Many use special consultants and programs that analyze their sites and advertisements to help them in the bidding for keywords. The more a merchant is willing to pay per click, the closer his ad will be to the top of the search results. Certain top keywords that have a lot of competition, and are very costly per click. Click thru rate can be boosted by creating headlines, product and service descriptions and URLs that are highly attractive to your target market, and its becoming a highly specialized business with parameters that are constantly changing.

Consultants, such as Google Adwords or Yahoo Search Marketing find targeted search terms that are applicable to your site, and provide analysis to help you in the bidding process. Their objective is to lower the cost per click and improve the quality of visitors who click your ad. They also analyze your keywords and make recommendations based upon the content of your site so you wont miss underused and highly cost-effective keywords. By preventing merchants from overbidding and eliminating bid gaps, they help merchants manage their return on investment on their PPC program. They can also set bid parameters to keep your total bids within your monthly advertising budget.