A favicon (i.e., favourite icon) is a tiny icon included along with a website. It is also known as shortcut icon, website icon, tab icon, URL icon, or bookmark icon.
It is usually 16 x 16 pixels in size and found next to any mention or identification of your website (e.g., page tabs, bookmarks menu, history results, etc.). It may be stored as a GIF, PNG, or ICO file.
The favicon typically appears on your browser tab.
A favicon is something that instils familiarity with your website and is generally used for the purposes of branding and improving user experience. When users see your favicon, it immediately helps them identify your website and lets them know that they’re in the right place. It also helps them to easily find your website when they have multiple tabs open in their browser.
Most favicons tend to be the same as the brand logos for that particular website.