The Favorites Icon (favicon)
Also known as the little-bitty-tiny icon
Professionally designed websites will commonly have a Favorites Icon . Although it's only 16x16 pixels, this little guy adds a nice touch to the address bar, and shows that there was attention to detail when your site was constructed.
The Favorites Icon usually appears after doing the following:
Add a website to your browser favorites or bookmarks. The next time you open your browser and select the website from your favorites or bookmarks, you should see the Favorites Icon.
Results vary depending on your browser but, it should appear in your favorites list next to the link, and in the address bar when you visit the site.