Superposition is a fundamental principle in physics and quantum mechanics that describes how different states can exist simultaneously. For example, when a coin is tossed, it can be thought of as being both heads and tails at the same time until it lands. This idea helps explain how particles, like electrons, can occupy multiple states or locations until they are observed. In the context of quantum computing, superposition allows qubits to represent both 0 and 1 at the same time, vastly increasing computational power. This unique property enables quantum computers to solve complex problems much faster than traditional computers, opening new possibilities in technology and science.