Quantum entanglement is a phenomenon in which two or more particles become interconnected in such a way that the state of one particle instantly influences the state of the other, regardless of the distance separating them. This strange connection defies classical physics and has been described as 'spooky action at a distance' by Albert Einstein. Entangled particles can exhibit correlated behaviors, meaning that measuring one particle will provide immediate information about the other. This property is fundamental to the development of quantum computing and quantum cryptography, as it allows for the transmission of information in ways that classical systems cannot achieve.