The document discusses four main types of adverbs: manner, place, time, and frequency. Adverbs of manner describe how an action occurs, such as "loudly". Adverbs of place indicate a location, like "here" or "outside". Adverbs of time specify when an action takes place, such as "tomorrow" or "yesterday". Finally, adverbs of frequency show how often an action happens, like "daily", "often", or "rarely". Examples are provided for each type of adverb.