Where to get & using @import method.
To use a Google Font on your website, all you have to do is go to Google Fonts
and search for a font. Click on the "Quick-use" button(a rectangle with a arrow in it). On the next page choose the styles and characters sets you want. Finally on the third point choose @import tab and copy the code that was generated. Now paste this code to the top of your CSS file and you are good to go using it on your site.
Using HTML method.
It is basically the same as the previous step, but instead choosing the "@import tab" on the third point, you'll need to choose "Standard". Again copy the code that was generated, but instead pasting it into CSS like you did on the previous step, you'll need to paste the code between the
tags in header.php file.