The first step is to make a 16x16 PNG image, which can be designed using image processing tools such as photoshop, and then saved to the local computer, and made online through ico or using the IconWorkshop tool to make ICO icons , the ico icon is named: favicon.ico
The second step is to upload the favicon.ico file to the root directory of the website, and add between the web page source code
:The third step is to upload the modified web page file to the server, and then open it with a browser to see the front of the URL I have my own designed ico icon.