This code snippet supports a number of our articles where Font Awesome is required or recommended. Font Awesome gives you scalable vector icons that can instantly be customized - size, color, drop shadow, and anything that can be done with the power of CSS. At the time of writing there's 675 icons.
Copy and paste the WordPress function into your theme's
functions.php file or, if you sensibly have one installed, your custom functions plugin.
Full usage details may be found on the FA website.