1. Copy the "Fonts" folder and the CSS file together into your website's CSS directory.
2. Link the CSS file in the `<head>` section of your website:
<head>
...
<link rel="stylesheet" type="text/css" href="your_website_domain/css_root/flaticon.css">
...
</head>
3. Add the corresponding class name to the element where you want to display the icon, for example: `<i class="flaticon-app-store"></i>` or `<span class="flaticon-app-store"></span>`.