A team is a group of people working together towards a common goal, though not all groups are teams. Teams take time to form as members learn to work together. There are different types of teams, including problem-solving teams which aim to improve quality, efficiency and the work environment, self-managed work teams where managers guide but don't supervise and members manage themselves, and cross-functional teams with members from different departments. Groups interact to share information and help members in their roles, while teams generate synergy through coordinated effort to achieve performance greater than just the sum of individual inputs.