To use Google material icons, add this cdn in html file inside head tag.
<link rel="stylesheet" href="https://fonts.googleapis.com/icon?family=Material+Icons">
An additional CSS class will be declared called .material-icons. Any element that uses this class will have the correct CSS to render these icons from the web font.
Icon example using its unicode.
Icon
Code
<i class="material-icons"></i>
Note: Material icons are 24px by default.