For those unfamiliar with the Skyrim version, the mod reduces the density of insignificant objects to 0, which removes them safely from the game and boosts performance.
This means small stones, rubble, debris, kelp, and other such items which don't require player interaction will no longer randomly generate.
To install it, all you have to do is use the Nexus Mod Manager and activate it. According to akkalat85 the load order shouldn't matter, but if pressed, he said he's place it after mods which edit the game's landscape.
Hit up the Nexus Mods link above for more information.