SEO services have proven to be a must in the success of any online marketing campaign. Subsequently, this particular market has seen the birth and growth of many seo services companies, some of which are able to provide their clients with comprehensive solutions that drive targeted traffic to their web sites with the major search engines such as Yahoo! or Google. In order to make sure that the seo optimization services that you are about to choose will really pay off, you should base your choice of seo services company on several important criteria such as their experience with seo rankings and the references they are able to provide.