Alot of energy goes into making a website score well with search engines, but unless your goals are met upon the page loading you have to get the user to do more than just show up.  There are many sites that have number one position that I visit in my Internet travels that I leave immediately.  I didn't buy anything, I barely read anything because the page isn't usable or is just repulsive.

This isn't easy, but it is part of the task.  Figure out what you want users to do and get them to do it with your design.  The Search Engine Optimization (SEO) is just the part that gets the chance to sell them.