You can add multiple tags to tasks in order to divide them into different categories and bring more structure into your project. To add a tag to a task, click on the tag button in the right side bar of your task detail dialog and select one or multiple tags from the drop down menu.
Note: Before you can add tags to a task from within the task dialogue, you have to create them in the project info dialogue. To do this, click on the info icon at the top of the project board and go to the register "Tags".
Tip: Try to assign intuitive colors to your tags!
Here are some tag examples - each line represents a combination of tags that could be used for a project:
High priority - Low priority - Pipeline
Feature - Bug - Design
Approved - For review - On hold
Research - Writing - Lab - Exam preparation