In the world of quantum mechanics, entanglement is the phenomenon where particles become so close, they're practically married. But, unlike your in-laws, they're connected in a way that defies the laws of space and time.
Imagine two particles, A and B, that are so entangled, they're like two peas in a pod. What happens when you measure one? The other, instantly, across the universe, knows what you did.
Still confused? Don't worry, we're working on it. In the meantime, enjoy our Quantum Memes for some comic relief.