With the activate plugin action you can quickly activate plugins. This action will activate the plugin through a AJAX call, which means the plugin will be activated on the background.
After activation the plugin will try to load new available settings pages so you can immediately use the navigate action to navigate to the new settings page(s).
Some plugins shield off settings pages and they cannot be retrieved through AJAX. These will become available the next time you visit the admin.
When the activation is successful a green checkmark will appear on the right side of the command field (replacing the loading icon).