Adverbs are words that modify verbs, adjectives, or other adverbs, providing additional information about how, when, where, or to what extent something happens. They often answer questions such as "how?", "when?", "where?", "to what extent?", or "in what manner?" Adverbs can indicate time (yesterday, soon), place (here, there), manner (quickly, slowly), degree (very, extremely), or frequency (often, rarely). For example, in the sentence "She ran quickly," "quickly" is the adverb modifying the verb "ran," indicating how she ran. Adverbs add depth and detail to sentences, enhancing clarity and specificity in communication.