Welcome sites are places that offer a warm and inviting atmosphere. MATS, doormats, and oases are all examples of welcome sites. MATS are small rugs or carpets that are used to decorate a room or entranceway. Doormats are MATS that are placed outside the entrance of a home or building to help keep dirt and debris from entering. Oases are areas of lush vegetation in a desert or other arid environment. All three of these welcome sites provide a sense of comfort and hospitality.