1. Copy the 'Fonts' folder and the CSS file into your website's CSS directory.
2. Link the CSS file in the `<head>` section of your website's source code: <head> ... <link rel="stylesheet" type="text/css" href="yourdomain.com/css_root/flaticon.css"> ... </head>
3. Apply icon classes to inline elements, for instance: <i class="flaticon-game-controller"></i> or <span class="flaticon-game-controller"></span>.