Delegation in simple terms is getting stuff done through others. The fundamental concept in delegation is Who will do What by When
What – make it clear what is expected to be delivered
When – make it clear by when they need to deliver it. Set a clear deadline.
In addition to “what” and “when”, “why” is also important. Explain to them why this task is important and how it connects to the larger picture.
In the end, when they deliver it, review the work, and provide feedback. Failing to review the work in a timely manner sends a signal that the deadline was artificial.