Although Google is not the end of th world when it comes to having your website visited by potential clients or customers, it is a good guage as to how the rest of the world finds you on the Internet.
The following article explains just how to create a website that is “Google Friendly”
http://www.google.com/support/webmasters/bin/answer.py?answer=40349&ctx=related
Following these guidelines will help Google find, index, and rank your site. Even if you choose not to implement any of these suggestions, we strongly encourage you to pay very close attention to the “Quality Guidelines,” which outline some of the illicit practices that may lead to a site being removed entirely from the Google index or otherwise penalized. If a site has been penalized, it may no longer show up in results on Google.com or on any of Google’s partner sites.
http://www.google.com/support/webmasters/bin/answer.py?hl=en&answer=35769#design