In practice
The path is simple: a customer says something, it reaches the person making the decision, something ships and the customer hears about it. Most teams complete the first 3 steps and miss the return.
Collecting feedback isn't a loop on its own. If nothing goes back to the customer, you built a funnel.
Why it matters for product builders
The return step earns the next piece of feedback. Customers who know you listened are more likely to send useful signal again.