Favicon, in turn, is the shortcut of favorites icon, which will be displayed by Internet Browser to distinguish different website. So a personal favicon represents your own style.
Usually favicon is a picture whose size is 16 * 16 pixels, storing in the root folder named after .ico.
So, the first step is that you must prepare a picture, after that, you can go to the website:favicon.co.uk to make your own favicon.ico with the picture prepared before.
Then download the favicon.ico via the download link, which under the button named Generate Favicon.
The last, you should replace the original favicon.ico with your new favicon.ico using the following commands:
$sftp username@hostname
$put your_own_favicon_ico favicon.ico
The username, hostname above are the names of your server ip address or name which contains your website. You should log in your server to complete replacing.
The your_own_favicon_ico is the absolute path of your new favicon.ico downloaded before.
When the two commands above completed, you have finished all the steps making your own favicon.ico for your website. Then just cleaning browser’s cache and history, opening your website again, you will find your own favorites icon on your browser’s tab.