What is next most important to add value?

Our VP Of Engineering asked us to think about this at work. We are all busy at work, but are we adding value to our customers with what we are doing now?

What is the next most important item on our backlog that add value to our customer immediately?

It’s a great way to prioritize relentlessly. I struggle with knowing how to prioritize in most of my career. I tend to work on a lot of projects all at once and taking a long time to deliver value.