Efficient organization of projects and teams on GitHub enhances communication and transparency, as outlined by GitHub Solutions Engineer Phil Holleran in a webcast. The webcast emphasizes establishing a clear organizational structure with a single GitHub organization containing a hierarchy of teams, which can be expanded as needed. For repositories, managing documentation, contributions, and releases consistently prevents sprawl and ensures all team members are informed about project progress, aiding new developers in getting up to speed. Task organization on GitHub benefits from utilizing task lists, labels, milestones, and project boards, which offer varied strategies for task initiation, assignment, and issue tracking, with project boards serving as central hubs linking people to tasks and issues.