This guide only applies to you if you're planning on making your app global.
After your app is Global, several ongoing things may come up.
You may like to add a new trigger or action based on user feedback or improve the existing user experience.
You can do this entirely self serve by following reading about app migration here.
The most important thing is to not make breaking changes. Zapier performs some automated checks to this regard but you'll want to be very careful changing things like:
In general it's safe to add something new and dangerous to change existing functionality. We recommend versioning your triggers and actions and hiding legacy versions. This way old Zaps still function but new users can use the new versions.