What are the advantages of enabling or disabling Samsung KNOX I've rooted my Samsung Galaxy SIII Neo Android device by following this XDA Developers link. I would like to know what Samsung KNOX is, and what the advantages of enabling it / disabling it are (as this is not discussed on the XDA page I just mentioned).

Also, if I disable Samsung Knox, then how can I reenable it at a later time?

The screenshots below show how I've used Odin on my PC to root my phone and what the Root Checker and SuperSU applications in use look like.
Directly from Wikipedia :


  Samsung Knox provides security features that enable business and
  personal content to coexist on the same handset. The user presses an
  icon that switches from Personal to Work use with no delay or reboot
  wait time.1 The manufacturer has claimed this feature will be fully
  compatible with Android and Google and will provide full separation of
  work and personal data on mobile devices and "addresses all major
  security gaps in Android.


(Download Android Terminal Emulator) then 
for Disable : 

pm disable com.sec.knox.seandroid


and after disable,  maybe you need this again ;

Enable :

pm enable com.sec.knox.seandroid


And i suggest you, in the SuperSu never touch For Disabling the Knox.
it maybe harassment you and need for the second root process.(this is happend for me, but maybe you need to try it).
Also , read these articles :

How to Disable KNOX Security

HOW TO REMOVE KNOX AND PREVENT POSSIBLE ROOT ISSUES CAUSED BY KNOX

How do I Remove or Uninstall KNOX