In the Review Project screen Template Tab, you can store project structures you want to re-use like 'Start Marketing Campaign for product X', 'Reply Offer To Tender Client Y', etc.
To add a project to the tab, use project cut and paste functionality.
To use a project template for a new project, just copy and paste it into the Projects Tab and update descriptions accordingly.
If you are a registered member, you can now share project templates with other users. Please find here the documentation for this functionality.
The actions under a Template project do not appear in the list of actions in the Review Actions screen.