A favicon is a small image that shows up next to the website's name. Here is the default Joomla favicon

You will either need to create your own 16 by 16 pixel image or use a favicon generator which can be found by searching the web

1) Once you have your image, open your FTP manager and connect to your Joomla site

This tutorial assumes you already have your site open in your browser

Scroll down to find the templates folder

2) Double click the folder that contains the theme your site is currently using

3) Now click and drag your favicon into the folder

4) Make sure Overwrite is selected and click OK

5) Once your image has been uploaded, refresh your site in your browser

Notice the new favicon

In order for the new icon to show up, you may need to clear your browser's cache

That's it! You now know how to change the default Joomla favicon