Path: Community Settings >> Customization >> Customize Site Behavior >> Engagement Features

Action of the day helps guide users through some of our core features and ensure that they are prompted to complete the actions they should within the system. This can also act like a reminder on your homepage at right nav side bar about the actions in hand.
 
This can be enabled only by the administrator of the community which will be visible by default to all the community members. NOTE: This feature will not be visible 30 days after the first login by the user.

This feature is shown at right hand side in a white box below the Search Ideas space.
Action of the day are in a series of 3 task which will keep changing at the day end once it has been completed. Each task contains set number of points which will be earned by the member once the task has been completed. 

As the member completes the task from the Action of the day list the tick will turn green and the task will be crossed through. There will also be a message displayed of the points earned. If any task is left incomplete the same will appear the next day or during the next login of the member along with the new task.
 
The few tasks that might show up in the action of the day could be New member feature tour, Submit a new idea, Vote on an idea, Share an idea, Follow a Idea, Join a discussion, Contact the Author, Join a Team, Invite Friends, Complete a Review, Help Refine an Idea, Estimate Idea ROI, Fund an Idea.
The tasks visible on the Action of the Day entirely depends upon on how the settings have been enabled in the community by the administrator.
For example: If Invite Friends has been enabled on the community only then this will show up on the Action of the Day task list.
 
Please Note: All the tasks will not be shown to all the users until they are assigned to do it. 

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