You may wonder how somebody website has a little icon on the url address. It is called a favicon. To add a new favicon to your site is actually pretty easy, what you need is an icon with a size of 16 pixels x 16 pixels. Note this icon file must be saved in .ico extension.
If you have a photoshop software or program installed in your computer, you can download the plugin from this website:
Or alternatively, you can use this online tool that will help you converted your small image to icon file.
Once your favicon.ico has been completed created, to link to your website, you just need to add the following style css. Note: make sure your favicon.ico path is correct.
<link rel="icon" href="favicon.ico"/>