Another great feature of CSS3 is being able to use custom web fonts in your website layouts, instead of being stucked with the boring Arial, Georgia, Courier etc typeface. In CSS3 however you are able to use any TrueType (.ttf) or OpenType (.otf) typeface in website layouts, simply by using the @font-face rule. With that you are able to load custom web fonts into your website and then be able to use the font, without having the problem of does the user have this font, or does the user have this font as well.