Expenditure multiplier, Tax multiplier, Balanced budget multiplier

Expenditure (Government Purchase) Multiplier
Increase in government expenditure => workers and captial owners receive wages or payments => increase in aggregate expenditures

Tax Multiplier
Increase in taxes => decrease in income => decrease in consumpton expenditures

Balanced budget multiplier
As expenditure multiplier is stronger than tax multiplier, equal increase in expenditure an tax will lead to increase in GDP.