The Samsung Galaxy Note 8.0 is a 8-inch tablet computer designed, developed and marketed by Samsung Electronics. The tablet runs Android 4.1.2 and serves as a platform for multimedia consumption including movies, music, and web browsing. It is the second entry in the Samsung Galaxy Note tablet range, which emphasises the use of a stylus, officially named S-Pen (S standing for Samsung), as an input device for tasks such as sketching and note-taking.
Step 1 - Download Framaroot
Step 2 - Install and open Framaroot, then select Aragorn it will run the exploit and install Superuser, once done reboot your Samsung Galaxy Note 8.
Step 3 - After rebooting check if Superuser is installed, if you want to check try downloading something like SIXAXIS compatibility checker, it will require root for this to be compatible then your done.