The purpose of a parliamentary vote of no confidence is to remove a sitting government or leader from power when they lose the confidence of the legislative assembly. This vote typically arises when the governing party fails to deliver on key policies, faces a significant public outcry, or becomes dysfunctional. A successful no-confidence vote can lead to the resignation of the government or trigger new elections. It serves as a critical check on executive power, allowing the legislature to assert its authority and hold the government accountable to its commitments and constituents.