‘Done’ means it works in the real world

Shipping a feature and/or user testing are not enough, it needs to have an impact in the real world:

““Done” ain’t finished. “Done” just means that you’ve created an output. The bigger question is this: did that feature create value? You need to observe that feature in the wild to see if it created the outcome that you want for your customer and your business. In other words: “done” gets you an output. “Validated” gets you an outcome.”