If you're not sure what rooting is then maybe do a google and see if it's something you'd like to do, this root method comes from the clever geezer GeoHot who cracked the PS3 and apple amongst other things
on you're android phone go to towelroot.com, once loaded hit the lambda sign, on phone go to settings, security and tick 'allow unknown sources' run the downloaded towelroot apk and install, run the app and follow the instructions, your phone should reboot and be rooted, install SuperSu from the play store and it's job done
on you're android phone go to towelroot.com, once loaded hit the lambda sign, on phone go to settings, security and tick 'allow unknown sources' run the downloaded towelroot apk and install, run the app and follow the instructions, your phone should reboot and be rooted, install SuperSu from the play store and it's job done