The word "aww" is an expression used to convey a feeling of affection, sympathy, or endearment. It is typically used when someone sees something cute, sweet, or touching. For example, when a puppy plays or a child does something adorable, people often respond with "aww" to express their feelings.
The expression "aww" is an informal interjection that originated in the early 20th century. It is a phonetic representation of the sound people make when they feel tenderness or sympathy. It stems from the primal need to vocalize emotions in a way that communicates warmth and affection.