Time to time it happens in meetings, that topics arise in the discussion that are important to your organization but not important to your meeting goal. But since they are important, people tend to discuss them here and now. And exactly that jeopardizes achieving your meeting goal and finishing your meeting on time. Meeting productivity goes down.
Instead of either not meeting your meeting goals or leaving the important task behind, just put it aside, assign it to the right person and “park” it thereby on the parking lot!