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

Code Example 1

<!DOCTYPE html>
<html>
<head>

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

  </head>
<body>

<i class="fa fa-car"></i>

    <i class="fa fa-car" style="font-size:48px;"></i>

    <i class="fa fa-car" style="font-size:60px;color:red;"></i>

  
</body>
</html>

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