Tasks are high level activities you can organize your time into. If you are doing client work, you can have different rates for different tasks and these will make it easier for your client to understand what you’re spending your time on.
For instance, if you are building a website you could have some of these high level tasks:
*Design *Front end development *Copywriting
The important thing is that both you, your team and your client are aware of what each means.
You can always add as many as you’d like to a project and edit your global task list in your Settings.