Congratulations. You have successfully configured on-demand revalidation for your entity types.
When you create, update or delete an entity in Drupal, your Next.js site will be revalidated to show the updates.
On-demand Revalidation is built on top of Drupal's Events API and Revalidator plugins.
If you'd like to customize, extend or provide your own revalidator plugin, see the documentation here.
See also the Entity Events documentation.
If you need help, feel free to create an issue on GitHub.
You can also reach out on Twitter.