Central banks help manage a country's monetary system by influencing interest rates, money conditions, and financial stability. They do not control the economy in any absolute sense, but their decisions can strongly affect borrowing, inflation, investment, and employment.

This is why central banking receives so much attention during crises. When credit freezes or inflation surges, central bankers become some of the most consequential unelected actors in economic life.

Reference:

Wikipedia: Central bank

https://en.wikipedia.org/wiki/Central_bank