You have learned how blueprints help you create or update files in a project. The blueprint files can be static (the content is always the same) or dynamic (the content differs, depending on the circumstances).
You might also understand better why codemodOptions and options exist, as well as which related files to update, should you decide to provide users more codemod options.
For brevity, our blueprints-v2-addon created only 1 file in the addon and the test app. To familiarize yourself with delimiters (in particular, with evaluate and interpolate), I encourage you to extend the project and add more blueprint files. You can also explore how to write integration tests for the create-files-from-blueprints step.