In Minecraft, rails are used to create minecart tracks, which can be used to transport players and items around the world. Rails can be crafted from iron ingots and wooden planks, and can be placed on the ground, walls, or ceilings.
There are several different types of rails, each with its own unique properties. Regular rails are the most basic type, and they allow minecarts to travel in a straight line. Curved rails can be used to create turns in the track, and powered rails can be used to propel minecarts uphill. Detector rails can be used to detect the presence of minecarts, and activator rails can be used to trigger other devices when a minecart passes over them.