Adverbs are words belonging to the word class that provides circumstantial information about events.

Adverbs of time tell us when something happens (tomorrow, soon, recently); adverbs of frequency tell us how often something happens (usually, often, never); adverbs of manner say how something happens (slowly, fast, well); adverbs of place say where something happens (here, away, home).

Adverbs (a word class) should not be confused with adverbials (a clause element).