A Welcome Sight' can be summarized as a pleasant or joyful experience. MAT is an acronym for the phrase 'Make A Trip, ' which is often used to describe a journey or excursion. It is also used to express the idea of taking a break from one's daily routine and exploring something new. The phrase 'A Welcome Sight' implies that the experience of making a trip is a pleasant one, and that it is something to be welcomed and enjoyed.