Following instructions will guide you on how to root your Samsung Galaxy Note 2. After rooting, you will be able to play with all sorts of advanced apps that involve Super user permission; messing with file system and so on.
-Make sure you have installed adb driver or Samsung Kies on PC
-Download Odin
-Download Galaxy note 2 CWM recovery and reboot device to Note 2 download mode which allows you download firmwares from PC.
-Open odin on your PC and select downloaded file for PDA tab
-Connect device to PC, and wait till device successfully added to com port and flash.
After rooting, we suggest you to visit Play market and update SuperSu and install Busybox which are required for all root apps.