It's pretty easy to understand. Businesses, consumers, savers, and governments all affect the economy. Whatever one group does affects the others.
Lower sales mean businesses hire fewer people, stock less inventory and pay fewer taxes.
This affects the amount of money governments can spend. It also affects the level of employment, which in turn influences how much consumers spend. So you see, our decisions and lives are shaped by many economic forces swirling all around us. The Bank of Canada sets monetary policy, acts as a banker to financial institutions and the federal government, manages the national debt on behalf of the government and issues bank notes. The Bank of Canada is also responsible for protecting the value of the dollar from being eroded by inflation.