What is the purpose of a mud room?

A mud room is a transitional space between the outdoors and the interior of a home. Mudrooms are often located near the front or back door, and used for storage of shoes, coats, hats, and other items that are typically worn outdoors. Mudrooms also provide a place for people to remove dirty clothes and shoes before entering the main living areas of the house. This helps to keep the rest of the house clean and free of dirt and mud.