Planner in Microsoft Office 365 lets you organize your tasks within your team easily. Planner allows you to set previews on the tasks to get the information related to the task in a single glance. 

Step 1: Sign in to the portal.

Step 2: open the Planner.

Step 3: You will create your own task and assign yourself. 

Step 4: Fill the required details needed for your task.

Step 5: Now you can preview your task and work accordingly.