Why does my iphone have 4 gigs of other stored on it?

When I plug my iphone into my laptop it says there's 4.8 gigs of a category called other? What is that and how can I remove it?

Likely the programm itself takes much space but programms (apps) can take a lot og gb

Http://appducate.com/2013/01/reclaim-other-storage-space-on-ipad-iphone-and-ipod/

hope i helped.