When the world is going eco-friendly, Indian Railways started an amazing service to reduce the consumption of paper.
This snapshot can be shown to the ticket checker and it’ll work as your ticket for the journey.
But make sure, the snapshot is clear and all details are easily displayed. Also, carrying the correct id proof is mandatory.
Such a screenshot of e-ticket is called as VRM (Virtual Reservation Message) while the printed form is called as ERS.
This is a latest addition to Indian Railways and not many people use it at the moment. But its perfectly safe and can be put in use.
For confirmation, you can check the notice of Indian Railways on the use of VRM.