The "instantaneous" aspect comes up in entanglement and measurement. Say you start off with an entangled pair of electrons A and B in your lab, and measure electron A. Measurement is an interaction, so you become entangled with the electron. By knowing the initial entangled state and your reading of electron A's state, you can know stuff about the state of electron B at the time of the measurement, even if electron B has traveled a very long distance in the meantime.

I personally find this point of view nicer than assuming that I somehow collapsed electron A's state and caused an instantaneous remote collapse of B's state.

Observer A observes one entangled particle at a spin up. At the same time, Observer B observes particle B at a spin down.

Observer A's observation of a spin up means observer B must see a spin down. However, the two observers are restricted at the speed of light to communicate this to each other.

It would initially seem like there is a instantaneous causal impact based on observer A's observation. But that's not the case.

I tend to think it was predestined what each observer see, but that leads to all sorts of philosophical questions.

I hope I did this topic justice, I find it quite interesting but have no background in it.

To actually collect information, you need to transmit data via some classical method i.e. the hou-c always wins