1. You need to make an icon file named favicon.ico and place it in the root directory of the website. In addition, since this is not the first time your machine has opened this website, it will only be visible after restarting. Other machines will see it first. It can be seen when it is opened for the first time. 2. Icon size description: 16*16 (website FAVICON) or 48*48 (software icon). How to use the website icon: After generating the website ICO (the one with 16*16 pixels), save it as favicon.ico, and then upload it to the root directory of the website.