Your URL and navigation structure is one of the most critical aspects of your site - it defines how users get around to view your content and provides keys for search engines that they use to index your site. If your URL structure does not describe your site accurately, you're not doing yourself any favors with the search engines.

What should your URL's look like?

Look at the URL (The 'link' to a specific page on your web site) on each page of your site to see how well your site is structured.

Search Engine Friendly URL Structure

http://frontdeskseo.com/seo-blog
http://sendside.net/index.php/solutions/sales-automation
http://www.medicalspamd.com/the-blog/2010/3/22/marketing-your-medical-spa-with-a-blog-part-1.html

Terrible URL Structure

http://website.com/index.php/article=2
http://website.com/index.php/server/subdir/site/posts=20975f23.html