As a parent you can set up a weekly allowance for your child. This is not associated with tasks or task completion.
Tasks, on the other hand, are specific jobs/chores you can create and assign to your kid(s), and pay them in return for completing them. We believe paying for completed tasks can help kids develop a sense of respect for earning money.
Tasks and allowance are two different ways of paying your child. It's up to you how you want to do it. You can opt for either/or do both!