A teleporter that can go on any surface
Mods introducing new content into the game.
Transportation of the player, be it vehicles or teleporters.
Krastorio doesn't have any surfaces except Nauvis, afaik. What are the surfaces that you go to?
You right if you only have krastorio installed this mod is useless. But if you have a mod that add other surfaces like Space Exploration or Factorissimo then It becomes useful. This mod was made for a personal K2SE modpack.