1. Copy the 'Fonts' folder and the CSS file into your website's CSS directory.
2. Link the CSS file in the <head> of your website's HTML. <head> ... <link rel="stylesheet" type="text/css" href="your_website_domain/css_root/flaticon.css"> ... </head>
3. Add icon classes to your inline elements, like <i class="flaticon-tennis-racket"></i> or <span class="flaticon-tennis-racket"></span>.