Redstone is a material in the popular video game Minecraft that allows players to create complex machines and circuits. It functions similarly to electrical wiring, enabling players to transmit power and signals between different components. Redstone can be found underground and is mined from ore blocks, which can then be crafted into dust for use in various creations. Players can use redstone to build a wide range of devices, from simple doors that open with a lever to intricate contraptions like automated farms and traps. The versatility of redstone encourages creativity and problem-solving, making it a key element in many Minecraft projects.