The estimated time of departure allows you to see when exactly the travel time starts. This way, you can more accurately calculate the transit time and the estimated arrival times. If you have any questions, feel free to contact our support team. For more flexibility with delivery orders, when you request a list of available time slots, you can send the delivery times you want to Instacart.
The delivery time depends on the time it takes to find the customer, deliver the order and collect the proof of delivery. In the example of home delivery, without an ETA, a customer can get angry if their food doesn't arrive within half an hour after ordering it.