Quantum Entanglement After Reading The Three-Body Problem

so I was reading The Three-Body Problem (amazing book btw) and it got me thinking about quantum entanglement. It’s the idea where two particles can become connected in such a way that changing one affects the other instantly, no matter how far apart they are. Wild, right?

From what I understand:

It seems connected to superposition (where particles can be in multiple states at once) and wavefunction collapse. But, to be honest, I’m still trying to wrap my head around how all of this works together. So, I’ve got a couple questions:

Real-World Applications: Are there any real-world examples of quantum entanglement actually being used yet? I know it’s tied to quantum computing and cryptography, but has it been applied outside of experiments in any practical way?

This whole "instantaneous" connection thing... doesn’t that go against the "nothing travels faster than light" rule in relativity? Or is this something completely different?

Potential for Faster-than-Light Communication?: Since entanglement seems to allow instant connections between particles, could it ever be used for faster-than-light communication? Or does the "no information transfer" rule still apply and prevent that?

Quantum Teleportation and its Limits: I’ve heard of quantum teleportation, where quantum information can be "teleported" from one place to another using entanglement. But can this ever be done with actual matter, or is it just about transmitting quantum states?