Explain the different approaches (usually ideological) of demand side (the idea here is that the economy is driven by consumers having more money in their pockets (most if not all of the fiscal policy of the pandemic era has been demand side - putting money in our pockets from the government - literally) versus supply side where the aim is to create more competitiveness and incentives in the market for entrepreneurs to build new companies and for existing companies to stay and grow - think of Tesla leaving California to move to Texas to save money on taxes - that's 'supply side'.