National conventions play a crucial role in the election process by officially nominating candidates for president and vice president, setting party platforms, and energizing party members and supporters. At the conventions, delegates from each state and territory vote on their party's nominee, based on the results of the primary and caucus elections held throughout the country. The chosen candidate then goes on to represent their party in the general election. The conventions also serve as a platform for the party to present its vision and agenda to the American people and to unite party members behind the chosen candidate. Overall, national conventions play a key role in shaping the outcome of presidential elections by determining the candidates who will compete in the general election and by setting the tone and priorities of the campaign.