I agree with jbliler.

In the world wide web, visibility is the key. There are a lot of establishments that would compete for your business. They offer page optimization, pay per click and other services that'll promote the ranking of your site in the top search engines like google, yahoo and msn. These services will help your company’s presence be felt worldwide.

however, this presence may equate to traffic---not sales. but same will be useful in the long run for it will create product awareness