Buckets allow you to sort tasks in an organized manner. This lets you create cards assigned to specific users that can be grabbed at will by any team member. Customize buckets to suit project or team requirements and arrange them in columns so it is easier to view them and manage tasks all at once.
This color-coding system is a neat little trick to group each task depending on your preferred category system. There are six colored labels you can use to indicate priority level, project theme, assigned user, deadlines, etc.