Definition:
an adverb is a word that modifies or describes a verb, an adjective, another adverb, a clause, a phrase, or a sentence. In the case of 'beautifully', it is being used to describe the verb, implying that the action was done in a beautiful manner.
Rules:
it can be found in the middle or end of a sentence, typically near a verb. It indicates the manner in which an action was performed. It acts as an intensifier.
Examples:
1) She paints beautifully.
2) The sky was painted beautifully for the new mural.
3) He adapted the recipe beautifully to suit his preferences.
Tips:
adverbs should not be used to describe nouns, as this can sound unnatural and clunky. Additionally, it can be all too easy to overuse adverbs – try to be as concise as possible!