A favicon is the icon you see next the URL of a web page in your browser’s address bar. Most web browsers also use these icons for bookmarks. Many favicons are .ico files, which is why Favicon Grabber features an option to convert to other formats.
Not every site uses a custom favicon… in fact at the time of this writing I have not made one for Of Zen and Computing.
Link via “Online Favicon Grabber” by Sizzled Core.
