Answer:
The mandate of heaven is a justification for the right for emperors to rule ancient china (like europes kings and "crowned by god" policies). The mandate of heaven states Emperors gain right to rule china from the heavens, it also justified rebellion's which happened a lot in ancient china, it states only one real/legitimate ruler in china could rule at a time.
THIS WAS IMPORTANT BECAUSE: The Zhou used the mandate of heaven to overthrow the Shang's rule over china.
Step-by-step explanation: