A favicon is a small 16×16 (or 32×32) pixel icon that serves as branding for your website. The main purpose of this feature is to make it easier for visitors to find your website (e.g. when they have multiple tabs open, they can distinguish them by favicons.)
Favicons are found next to anything that identifies your website. This includes bookmarks, tabs, toolbar apps, history results, and search bars. Every favicon is connected to a specific website. Here is an example:
The filename of the favicon must always have the format
favicon.ico and conform to a common standard. It’s usually created by the website designer and placed in the website root directory along with other website files.
Web browsers that support favicons display the favicon in the address bar and in bookmarks. Web browsers that support tabs also display a favicon in each individual tab in the title.