If you have projects/plans and would like to manage them specially if you are using agile/scrum methodologies then you can use Office 365 Planner, watch this video
screenshots from Planner:
Extra posts:
Manage your team shifts with Microsoft Office 365 StaffHub 
Manage Meetings with your customers using Microsoft Office 365 Bookings 
Manage Planner tasks assigned to you within Microsoft To-Do 
How to be updated about Office 365 and Microsoft 365 Updates? 
Office 365 Getting Started 
WorkFlows for Office 365