What does power peak avoidance mean?

In daily life, except holidays, it is the time when social electricity consumption is the largest. This is called "peak", and the electricity consumption drops sharply after 1 1 at night. This time it's called "Valley". Shifting peaks and avoiding peaks is to let some enterprises use electricity at peaks and valleys without electricity. I am in the cold storage of the city slaughterhouse, which is to turn on the machine at night and stop the machine during the day. Of course, the main reason why enterprises do this is because the electricity price at night is much cheaper than during the day.