Google Fonts

Google Fonts is a service from Google that includes some font families and functionalities (including APIs) for using these, like on web pages:

• Free to use - Including for commercial purposes
• Pre-hosted - No need to host them yourself
• Downloadable - For use in print.

WordPress

You need to take some action to incorporate Google Fonts in a WordPress website, like through CSS [1], or through a Google Font-related plugin:

• Easy Google Fonts [2], [3]
• Google Fonts Typography - aka. Google Fonts for WordPress [4]

Sources

• https://en.wikipedia.org/wiki/Google_Fonts
• https://www.cloudways.com/blog/google-fonts-wordpress/
• https://ostraining.com/blog/wordpress/adding-google-fonts/