A patent provides a monopoly right for a limited period to prevent others from using, selling, making or otherwise exploiting an invention.
This right is granted in exchange for disclosure to the public and industry of the technological developments described within the patent.
Patenting of an invention can provide a commercial advantage over likely competitors. Without a patent you are powerless to prevent others from using your invention which is reason enough on its own to patent.
Learn more about the patenting process in Australia.