Don't do the happy dance just yet. This is for the Exynos version only. All US variants still have a locked bootloader and as such have no root method. If you are on T-mobile or AT&T you can more than likely grab an international version with an Exynos processor if you just have to have root.
To root your S7 or S7 edge you will be using Odin to flash the TWRP custom recovery. Once custom recovery is installed you will be able to flash SuperSU. Head to the link below for all the proper download links.
via GalaxyS7root