We just launched Recurring Missions, and what they simply mean is that, Artists can now hire you to do something for them repeatedly - and then pay you for it.
When you see something like this: "Recurring for 5 Days. Overtime Compensation is ₦40,000." under a mission, what it simply means is that you will be executing that mission everyday for 5 Days and will be paid ₦40,000 for it. As simple as that.