We can do any functions on our dekstop just by our voice commands no need of typing.
It can search anything on web application.
It can open various apllications with our voice command.
It can tell us date, time, current temperature, latest news, our current location,etc
It can also entertain us by saying jokes, by playing musics, movies, etc.
It can also help us in our Maths calucations.
It also tell us detail step by step recipes for various dishes which we want.
It can text messages and can also make calls for us.
In simple words it performs mostly all functions which make our life's easier.