Copyright, a form of intellectual property law, protects original works of authorship including literary, dramatic, musical, and artistic works, such as poetry, novels, photograph, Painting, a speach, movies, songs, source code of a software program, the binary executable file, Website, Mobile App, and architecture.
It registration with IPR Authority essentially ensures that any creative work cannot be copied without the permission of the author or creator. This allows the author to charge others for copying his work, or modifying it, or building on top of it. For example, downloading an image from Shutterstock and using it on your own website without purchasing or taking on rent is violating the copyright of Shutterstock. Shutterstock can file a suit against you to claim its value of the image.
By Registering your work, basically you wanted to protect your right over that and some sort of earning by letting it to others for using.