Shopify’s font library is a collection of fonts that includes system fonts, a selection of Google fonts, and licensed fonts from Monotype.
It’s easy to change the fonts in your theme and you can choose a different font for your headings and body text.
In the admin area, click “Customize” next to your theme then choose “Theme settings” from the admin sidebar.
Now click “Typography” and you’ll see the options to select your chosen fonts.