Adjectives and adverbs are types of words known as modifiers - that is, they modify or describe other words.
Adjectives are used to modify nouns, noun phrases, and pronouns. They can be used to describe attributes including sound, taste, smell, touch, color, appearance, emotion, and more.
Adverbs typically modify verbs, but also describe adjectives, phrases, and other adverbs. Adverbs generally end in “-ly,” but just because a word ends in “-ly” does not make it an adverb.