Presidential elections are a formal process through which citizens of a country select their leader, known as the President. These elections typically occur every four years and involve candidates from various political parties campaigning to gain public support. Voters cast their ballots to choose their preferred candidate, and the one with the most votes usually wins. In many countries, including the United States, presidential elections include a series of primaries and caucuses, where party members select their nominees. The final election often features debates and advertisements, allowing voters to learn about the candidates' policies and visions for the future.