Step 1: Happily copy the "Fonts" folder and the CSS file together into your website's CSS directory.
Step 2: In your website's `<head>` section, don't forget to link the CSS file! <head> ... <link rel="stylesheet" type="text/css" href="your_website_domain/css_root/flaticon.css"> ... </head>
Step 3: Where you want to use icons, just add the icon's class name, like this: `<i class="flaticon-piggy-bank"></i>` or `<span class="flaticon-piggy-bank"></span>`.