There is always a time when you have a party going on and you have a huge list of songs playing and all of a sudden a unknown unwanted track plays up. Now you have to go look for your laptop to skip the track.
How about you just pull out your android phone out of your pocket. Unlock it and skip the song with just a tap and keep partying without going to look for you machine.
Unified remote does just that.
It is based on a client server model, where the machine runs the server and the android phone runs the client.
It can connect over WIFI as well as bluetooth.
Install the application on the phone.
Install the server on the computer.
After that you can select the type of remote you want from the plethora of options available.
I prefer the media control one.