The Netherlands national under-21 football team is a group of young soccer players from the Netherlands who play soccer together as a team in competitions against other countries' under-21 teams. The team is made up of players who are 21 years old or younger and are chosen because they are some of the best young soccer players in the Netherlands. The team practices and plays together in order to improve their skills and to compete against other countries' under-21 teams. The hope is that these young players will become part of the full national soccer team one day and represent the Netherlands on an international level. Basically, the Netherlands national under-21 football team is a group of young soccer players that represent their country and work hard to become better players and potentially play for their country's full national soccer team in the future.