Like the color settings, the font settings are made in the Theme Settings. Shopware 6 does come with some fonts pre-installed, but if you will create unique Layouts, you can’t avoid using your own fonts.
In the following screenshot you can find the place where you define your font. In the next section below I will explain how to use Google Fonts to embed fonts.

Embed font via Google Fonts
With the help of the Theme Features – Addon you have the possibility to integrate Google Fonts legally compliant. Activate the extension and set the corresponding “checkmark” in the app settings and you have a huge variety of fonts available.