This view is like the core Extensions Manage view, again with the big difference that you can manage your extensions to all your stages at the same time.
From this view you can do the follow:
- enable/disable any extension,
- uninstall any extension.
You may choose to activate the email notification in case a stage is having a new update. You may do that for each stage options. You just activate and put the desired email.
For stages using Akeeba Admin Tools, keep the ordering of the corresponding plugin greater than SP Staging plugin.