The purpose of this field is to provide a point of contact / management for each sales team.

When a leader is assigned to a team, they are responsible for overseeing and managing team activities and possibly approvals. They may provide guidance on sales strategies, monitor the progress of team members, and help to resolve any issues that arise while opportunities are being moved through the sales pipeline. 

They may also have administrative responsibilities, such as managing team member access to the CRM system, assigning leads and opportunities to team members, and tracking performance metrics.

While there is no functionality related to this field, using it may improve your ability to effectively manage and coordinate your sales team(s) and their selling processes.