This is straight from Amazon’s leadership principles. It also seems related to binary/ruthless prioritization, the Agile principle of “Simplicity — the art of maximizing the amount of work not done”, and customer focus.
An ambiguous problem may have many possible solutions. We risk slowing to a halt investigating all of them. It’s helpful to regularly question if a given task is important. “Analysis paralysis” might describe this, but I prefer Amazon’s phrasing: “Bias for action”.
As a concrete example, in an interview, there may be many possible ways to solve a problem, but time is limited and solving the problem by any means is preferable to identifying all possible solutions without implementing any.