“Closing the loop” means to follow up or finalize a discussion with a customer, employee, or colleague.

Businesses really flounder when someone (especially a leader) doesn't close the loop.

Important discussions and decisions get delayed or forgotten about.

People end up focusing on the wrong things when the loop isn't closed.

Closing the loop does take some effort. However, the amount of time and stress it will save you and your team is well worth it.