The term CLASS='font-bold underline-link hover:text-barberry-yellow'>TOP-CLASS='font-bold underline-link hover:text-barberry-yellow'>TIER (CLASS='font-bold underline-link hover:text-barberry-yellow'>FIRST-CLASS) refers to something of the highest quality or standard. It is often used to describe a person, product, or service that is considered to be the best of its kind. The term is derived from the idea of tiers, which are levels of quality or importance. CLASS='font-bold underline-link hover:text-barberry-yellow'>TOP-CLASS='font-bold underline-link hover:text-barberry-yellow'>TIER is the highest CLASS='font-bold underline-link hover:text-barberry-yellow'>TIER and implies excellence.