Microsoft Planner, as its name suggests, is designed to help make plans and assign and track tasks.
Each plan has its own "board" with each task or item represented by a "card" (see picture below).
Dashboard displays and email notifications help keep participants on track.
Planner integrates with other Office 365 capabilities, including Groups.
This new program is included in various Office 365 subscriptions including Enterprise E1–E5, Business Essentials, Premium and Education.
Eligible users will see Planner in the Office 365 app launcher in the coming weeks.