“Forest is a dream where you may find yourself and dream is a forest where you may lose yourself!” ~ M. M. Ildan
Copy and paste the code in the head tag of your html document. So that you can style your components by just adding class names to your html elements.
We have already imported Google Icons & Font Awesome Icons CDN links in main.css file, so you don't have to explicitly import their links in head tag.
Simply visit Google Material Icons & Font Awesome Icons and add your desired icons in your html file.