A Favicon (Short for favorite icon),also known as a website icon, url icon,shortcut icon,or bookmark icon is a 16x16,32x32 or 64x64 pixel square icon associated witha particular website or webpag.Blogger use blogger faviconfor every blog we create.But we can change it to any favorite icon.
Blogger Default Favicon
In Above image we show you our site favicon that you can see in your browser near of address bar.
So now I Think your are understand What is the Favicon.