1. Copy the "Fonts" folder and the CSS file into your website's CSS directory.
2. Link the CSS in your page's <head> section: <head> ... <link rel="stylesheet" type="text/css" href="yourdomain.com/css_root/flaticon.css"> ... </head>
3. Add the icon class to an inline element where you want the icon to appear, e.g., <i class="flaticon-airplane49"></i> or <span class="flaticon-airplane49"></span>.