What piece of classical music is played on the VERY advert?

Without specific details about the advert in question, it's difficult to identify the exact piece of Classical Music being played. Many adverts feature well-known classical pieces, such as Beethoven's "Ode to Joy," Vivaldi's "Four Seasons," or Bach's "Air on the G String." If you can provide more context or details about the advert, I may be able to help identify the music more accurately.