I found this fascinating quote today:
Getting people to your site is the key, right? Once there, your product is great, so if they are truly interested, a sale is no problem! But getting them there is a problem! Take a minute and type in something like "jewelry" to the search box. What happens? Pages and pages and pages (and thena few more) of sites related to Jewelry are listed. Where is yours? Lost somewhere in that crowd? What are the chances someone is going to choose to click on yours? It's a tough system out there!Mommy Tyme, Mishaps of Mommy, Nov 2009
You should read the whole article.