What does this mean, pertaining to a real estate contract with a firm:

Any sale of the property within 180 calendar days subsequent to the expiration of the listing period (holdover period) to anyone with whom Broker negotiated and whose name was submitted, in writing, to Seller by Broker during the Listing Period (including any extensions thereof).

After the real estate contract ends, if you go back and sell the home to someone that the broker or agent talked to or showed the house to, you will still owe them the commission.

Often homeowners get the silly idea toward the end of a contract, and tell the buyer, wait for 30 days and I will take your offer so I don't have to pay the real estate person. So this protects the real estate agent from that