In the default mode, tasks are grouped according to their status 1: Open, In Progress, Done or Closed.
It is also possible to group them by priority 2: Highest, High, Medium, Low, Lowest, and by people 3, including virtual resources. In the latter case, all the unassigned tasks will be displayed in a separate column.
You may also find useful the possibility of grouping tasks by some Custom fields you have created in your project.
Grouping is possible for the following types of Custom fields:
Filters are meant to simplify your work with cards, especially when you have plenty of them or when you need to find a particular group of tasks.
Learn here what types of filters you can apply, how to use them and save thereafter.