A bookmark icon, also known as a shortcut icon, Web site icon, URL icon, tab icon or favicon, is a miniature image associated with a website. It may be a smaller version of the logo, a portion of the logo, initials, or a representative icon.
When someone visits your website, it appears in the browser address bar. It also shows in the visitor browser tab and bookmark list.
The icon adds a touch of professionalism and class to your website, as well as instant recognition when a user has multiple browser tabs open.