You can get feedback regarding your website’s usability. I ran the tests on my page and some of the errors were worthless. The main one I didn’t like was a complaint (of the highest priority) that I didn’t have a link to the home page, when I do. The problem is that they were searching for dan.hersam.com instead of dan.hersam.com/index.html. I use the latter because it doesn’t force the web server to figure out the name of the file to return. I informed them of their error and hopefully they’ll fix it.