Adland is a jokey, insider name for the whole world of advertising — the agencies, the campaigns, the people, and the way that business talks and thinks. It treats advertising as a place, almost like a country you can live in. You hear it in newspapers, magazines, and inside the industry itself, not in a careful classroom sentence. It can sound fond, or a little sharp, depending on the speaker: sometimes it means “that shiny, talky world over there.” It is informal, and it names the business as a whole, not one company or one advert.

廣告圈、廣告業（把整個廣告世界當成一個「地方」來說的行話）