Why do power plant companies (power suppliers ) want us to save energy?

Question

I see many commercials especially now just before summer, from the power supplier, urging the customers to save power; by setting the AC temperature to “room temp” or turning off the water boiler. And I can’t understand why they would spend money on media to ask their customers to “buy less product”.

In: 11

Answer 1

Thanks for all the great answers,
So to summarize, I understand that there are two main reasons:

1. The power suppliers can’t supply the needed amount, so they ask customers to reduce consumption in order to prevent blackouts, and I assume that they don’t increase production capabilities since the demand only spikes for a relatively short period
2. The governments make them do it

Makes sense, did I miss anything?