Why do you need favicon.ico?
Even if you don't set favicon.ico on the web, the browser will access favicon.ico while visiting the web. For example, when visiting the page: https://xyzkit.com/pdf-to-image, the browser will automatically access https://xyzkit.com/favicon.ico.
This means that if the favicon.ico file is not placed in the root of your website, the server will generate a 404 error log and will go to the 404 page. From a technical point of view, a large number of accesses to 404 pages will take up your bandwidth, so you need to create a favicon.ico to avoid this problem.
Favicon.ico will make the site look more professional, beautiful and more personalized. It's also necessary to create a personalized logo for the site that fits the theme of the site (favicon.ico), which is also impressive.
How to set up favicon.ico?
If you put favicon.ico in the root of the website, you can access it by: http://<your domain >/favicon.ico. Then you don't have to do any configuration on the webpage.For example, this site can be accessed via the URL (https://xyzkit.com/favicon.ico).
If your favicon.ico is not in the root of the site, you need to include the following two lines of HTML code in <head></head>:
<link rel="shortcut icon" href="image/favicon.ico" type="image/x-icon" />
<link rel="icon" href="image/favicon.ico" type="image/x-icon" />
Use the right favicon.ico
ICO: Includes multiple resolutions (16*16, 32*32, and 48*48 most commonly used, Mac OS X sometimes uses 64*64 and 128*128), ICO file image/x-icon.
GIF: Use 16*16, 256 colors, GIF file image/gif.
PNG: Use 16*16, 256 colors or 24 bits, PNG file image/png.
Note: GIF and PNG format favicon are not supported by all browsers. For compatibility (system and browser support) reasons and display effect, I recommend 48*48 favicon.ico.