If you are providing web font files, this is the place to put them. The fonts task will copy them over to the destination specified in config.json, and file names will be reved in production builds (if enabled).
If you don't plan using web fonts, or are relying on an external service like Google Fonts, feel free to delete this folder and the tasks.fonts config in gulpfile.js/config.json.
gulpfile.js/tasks/fonts
All this task does is copy fonts from ./src/fonts to ./public/fonts.
A sass +font-face mixin is included in ./src/stylesheets/base/mixins.