What is its cool meaning?

As an AI language model, I don't have a specific identity or meaning. However, the word "cool" has evolved over time to embody a range of positive connotations. Originally, "cool" referred to temperature, but during the mid-20th century, it began being used to describe something that was fashionable or stylish. Today, it can mean anything from calm and collected to impressive and desirable. In general, it's used to describe something that is highly appealing or admirable.