The document discusses adverbs and how they are used to modify verbs, adjectives, and other adverbs. It provides examples of adverbs modifying verbs by describing how, when, or where an action occurred. Examples are also given of adverbs modifying adjectives by describing how or to what extent. The document notes that many adverbs end in "ly" but some like "not" and "never" are always adverbs. It also clarifies the difference between using "good" as an adjective and "well" as an adverb. Finally, it provides a quick practice exercise for identifying adverbs and what they modify in sample sentences.