When computers share information with one another, the information gets encoded into bits, then decoded back into its original form. In the process, pieces of the information sometimes get scrambled, or lost. As a simplified example, an improperly decoded email that says “I am now sending you the money” could arrive at its destination saying “I am not sending you the money.”
Source:
https://phys.org/news/2020-08-accurate-decoding-fragile-quantum-states.html