CSS Icon
The CSS icon can be added inside any HTML web page easily by placing CDN link inside <head>
section of the project. This CDN link is provided by different icon providers namely font awesome, google icon, bootstrap icon, etc.
Font Awesome Icons
Font Awesome icon can be easily used inside any project. Basically, just go to font awesome official site and sign in & get a code and then add it in the head section of the HTML page.
Statement
<script src="https://kit.fontawesome.com/{yourcode}.js" crossorigin="anonymous"></script>
Statement
<i class="fas fa-cloud"></i>
The CSS icon can be inserted inside the project very easily. Followings are the popular icon provider like google icon, bootstrap icon & font-awesome.