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.
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.
1) She paints beautifully.
2) The sky was painted beautifully for the new mural.
3) He adapted the recipe beautifully to suit his preferences.
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!