Jumper Wires are flexible electrical wires with connector pins at each end, used to establish temporary connections between components in a circuit without soldering. They are commonly used in breadboards, Arduino projects, and prototyping to quickly modify or test circuits. Jumper wires come in male-to-male, male-to-female, and female-to-female variations, allowing compatibility with different connectors. They are available in various colors to help organize connections but functionally remain the same.