You can define the priority of a task directly in the Tasks list or in the Task details page.
By default, tasks are in a "NORMAL" priority but you can set them to the following options by order of magnitude:
As explained in the "Organising tasks" article, the prediction engine of planless.io works with priorities, meaning that the higher a task in the list, the higher its priority for the planning calculation.
Depending on how you structure your list of tasks, for example in projects, this natural order isn't quite enough for managing the priorities of the tasks. You want to be able to work on tasks from different projects at the same time and not one project after the other.
That's where you will use priorities in order to define the urgency of each task.