The user has the related permission can define the task categories in the system. Some tasks belong to the same group and can be assigned to a specific category. For example, the design and execution of beams, foundations, and columns relate to civil engineering. So you can define the civil engineering category in the system. You can find this option in the Basic definitions – Task categories menu.
Project Task Categories
Defining Project Task Categories is possible through this path: Projects and then choosing the Project Task Categories icon like the below image: