Consensus is essentially the resonance of one's own thoughts and the thoughts of others.
The importance of the consensus mechanism is that it can produce rules that have the final say. Everyone finally did what the rules said together, and the choice of the rules was decided by everyone.
It can also be said that the consensus mechanism indirectly yields the result of the decision.
But Bitcoin consensus can only be popular in the cryptocurrency world. At present, it cannot be popularized in daily life.