noun
billboard; advertising tower
A large outdoor advertising structure, often a tall sign or tower used for commercial promotion.
駅前に新しい広告塔が建てられた。
A new advertising tower was built in front of the station.
Figurative use for a person who represents or promotes an organization, product, or cause, often as a public face or spokesperson.
彼女は会社の広告塔としてテレビに出演している。
She appears on TV as the face of the company.