Spidertron? Nah, they're mere Insectitrons. Early-Mid Tier Spidertrons for all your spider needs.
Mods introducing new content into the game.
Transportation of the player, be it vehicles or teleporters.
New ways to deal with enemies, be it attack or defense.
You've marked it as a 0.18 mod, even though 0.18 doesn't have a spidertron :) Not a big deal because I imagine hardly anyone is playing 0.18 anymore, and any 0.18 mods are allowed to be loaded in 1.0, but still...
I just though that game loads all mods under 0.18 and not 1.0, but of course, I will change that next update