In order to get an exclusive right on the product, registering the design is very much essential for the holder. The registration of the design is enough to refrain other from copying the same. If anyone tries to copy the design, then legal action can be taken against him and the holder can also claim damages from him. If a design is registered, it allows the holder to:
Sell the IP and design to others
Give the license of the design to someone else but at the same time, retain the IP rights to himself
When the design is published, the public at large will also benefit from the same. People will be able to see the latest developments in the technology and can also freely use the design once the registration ceases.