Choosing a web-safe font for your Trellis site is highly recommended for performance, page speed, and Core Web Vitals. Web-safe fonts are the fastest option because the browser and website aren’t loading any extra files.
In the Display tab in the Trellis settings, you'll find that all of these fonts are marked as Web Safe:
You are able to select a System font as well, which would be the default font loaded by a computer or mobile device. This also generally will be a speed-safe choice.
If you wish, you can use other Google fonts that aren't web-safe or add custom fonts, but this isn't recommended. Web-safe or system fonts are better options for site performance.