Check out example codes for "link font awesome html". It will help you in understanding the concepts better.

Code Example 1

<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" />

Code Example 2

<link
      rel="stylesheet"
      href="https://use.fontawesome.com/releases/v5.13.0/css/all.css"
      integrity="sha384-Bfad6CLCknfcloXFOyFnlgtENryhrpZCe29RTifKEixXQZ38WheV+i/6YWSzkz3V"
      crossorigin="anonymous"
    />

Code Example 3

<!-- Add this in your <head> tag -->
<link
      rel="stylesheet"
      href="https://use.fontawesome.com/releases/v5.13.0/css/all.css"
      integrity="sha384-Bfad6CLCknfcloXFOyFnlgtENryhrpZCe29RTifKEixXQZ38WheV+i/6YWSzkz3V"
      crossorigin="anonymous"
    />

Code Example 4

<link rel="stylesheet"  href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">

Learn ReactJs, React Native from akashmittal.com