A favicon is the little icon that appears on the left in the browser tab and url box.
The default icon is the Joomla! logo, but you may change it to suit your site.
Your favicon is located in _________
1. create a 16x16 pixel image. You may use graphic software, or an online tool such as: http://antifavicon.com/
2. convert to ico format
3. copy it to ___________