A footballer is a person who plays football, a popular team sport played worldwide. The game involves two teams, each trying to score goals by getting a ball into the opposing team's net. Footballers can play in various positions, such as forward, midfielder, defender, or goalkeeper, each with specific roles and responsibilities on the field. Professional footballers often play for clubs in domestic leagues or represent their countries in international competitions. They train regularly to improve their skills, fitness, and teamwork. Many footballers aspire to play at the highest levels, such as in the FIFA World Cup or UEFA Champions League.