noun
book band ad; obi strip ad
A narrow paper strip wrapped around a book's dust jacket, printed with promotional blurbs, reviews, or advertising. Common in Japanese publishing.
新刊の帯広告には、有名作家の推薦文が印刷されていた。
The new book's obi strip had a recommendation from a famous author printed on it.
帯広告のキャッチコピーに惹かれて、その本を買った。
I bought the book because I was drawn to the catchphrase on the obi strip.