A team leader is necessary to provide direction, guidance, and support to team members in order to ensure that goals and objectives are met effectively and efficiently. They are responsible for coordinating tasks, resolving conflicts, and motivating team members to work together towards a common goal. A team leader also serves as a liaison between team members and upper management, communicating important information and feedback to both parties. Ultimately, a team leader plays a crucial role in driving the success of a team and achieving desired outcomes.