A task status will tell you how close your task is to completion. Typical task statuses include:

You can see and edit the status property both in dartboards and individual tasks.

Status is shown in all dartboard layouts. In board layouts, tasks are grouped by status by default. In calendar, status is shown in color by default. In list and roadmap layouts, status will show as a column like this:

By default, individual tasks will also show the task status. It will be visible in the properties section of the task, below the task title:

You can easily update the status by hovering over the current status and either changing it or marking it as done using the revealed check mark:

In addition to the default statuses, Premium accounts can also set up custom statuses. To do this go to settings, then Properties and click on Status. You will be able to add different statuses to the different status categories: Unstarted, Started, Blocked, Finished, and Canceled. You can edit the status icon, color, name, and description from this menu.

If you want different dartboards to use different statuses, you can do that as well.

See this article on how to use types to accomplish this.