1. Copy the 'Fonts' folder and the CSS file into your website's CSS directory.
2. Add the CSS link in your website's <head> section: <head> ... <link rel="stylesheet" type="text/css" href="your-domain/css_root/flaticon.css"> ... </head>
3. Use icon classes on inline elements. Example: <i class="flaticon-legal-document"></i> or <span class="flaticon-legal-document"></span>.