The :link is used to target the unvisited link for styling not the links which is already visited. For styling on visited use ":visited", for styling on click use ":active" and for styling move mouse on link use ":hover".
Syntax:
:link {
//property
}
Example:
<!DOCTYPE html>
<html>
<head>
<style>
a:link {
background-color: limegreen;
}
</style>
</head>
<body>
<h3>Unvisited links.</h3>
</body>
</html>
Output:

Supported Browsers:
- Google Chrome 1.0
- Edge 12.0
- Firefox 1.0
- Safari 1
- Opera 3.5