A favicon is a small graphic icon, often a website’s logo or representative image, that appears in the browser tab next to the page title, as well as in the address bar or bookmarks list. Its main function is to facilitate quick identification and visual recognition of the site while browsing. Favicons are generally in .ico, .png, or .jpg format, with common sizes of 16×16 or 32×32 pixels, and can be adapted for high-resolution screens. They reinforce the site’s visual identity and improve user recall.