<!DOCTYPE html>
<html>
<head>
<title>Title of the document</title>
<link rel="stylesheet" type="text/css" href="//use.fontawesome.com/releases/v5.7.2/css/all.css">
<style>
body {
font-family: Arial;
font-size: 15px;
}
a {
text-decoration: none;
color: #000000;
}
a:before {
font-family: "Font Awesome 5 Free";
content: "\f00c";
display: inline-block;
padding-right: 3px;
vertical-align: middle;
font-weight: 900;
}
</style>
</head>
<body>
<a href="#">Here is a link</a>
</body>
</html>