A Minimum Viable Product (MVP) is the core of your application that you should be aiming to build before you spend time on nice-to-haves, bells-and-whistles, and stretch-goals.
To help focus your Product Owner and team on the core Product Backlog Items (PBIs) needed to fulfil the MVP, it can help to add a Police Line to your backlog.
Then when deciding if a feature is vital or not, simply drag it above or below this line.
✅ Figure: Good example – Police Line added to help the team prioritize