Some SEO companies create doorway pages for your site that may, or may not, get ranked high in search engines. By all means, stay away.

Creating doorway pages is an old trick that worked a few years ago. It works like this, create
many separate pages optimized for a key phrase that serves as a doorway to the main site. It’s not a natural part of the site. Its only purpose is to rank high in search engines. As a result, it does not provide real content or information to visitors. All that visitors can do is “click here to enter”.

If you use this trick, you have a good chance to get banned permanently. Take a look at this page and see what Google thinks of doorway pages: http://www.google.com/webmasters/guidelines.html

Some web sites may slip through the radar, but the risk is very high. Google, and others, is fighting hard towards doorway page spam. All it takes to pull the site down may be as simple as a spam report, most probably from competitors. Anybody can file a spam report here: http://www.google.com/contact/spamreport.html

And your competitors WILL do that when your site is ranked high. Once search engines find you’re using this trick, the whole site is gone. Thousands of domains disappear and get banned permanently every month.

The bottom line is, do you want to put your business on solid, ethical ground, or want to take the risk?