Final answer:
Yes, the sentence contains an adverb 'wildly' to describe the degree of success.
Step-by-step explanation:
Yes, this sentence contains an adverb. The adverb in the sentence is 'wildly', which describes the degree of success of the free show. Adverbs are words that modify verbs, adjectives, or other adverbs, providing more information about how, when, where, or to what extent something is done. In this case, 'wildly' modifies the adjective 'successful' by intensifying it, indicating that the show was extremely successful.
Learn more about adverbs in English sentences