Ionic Pro Appflow Live Update

Hello guys,
I have some doubts about live deploy not clarified in the documentation (I did not find it).
For example: I generated an apk with the background method of update and distribute it to my users. If I change the method to auto I need to generate a new apk?

To update distributed apks (deploy) using automation should I create package or web automation?

I confess I’m confused!