In short, the function of this narrow strip (waist seal) is to "advertise" the book. The reason why there is a "waist seal" is that book publishing is market-oriented and the industry competition is fierce. Publishers use the "waist seal" as a carrier to promote books and praise them to promote book sales.

The narrow strip (waist seal) is an advertisement for books. The copy of the waist seal usually contains three aspects of information: the award won by the book; Celebrity recommendation and media comments; The sales of this book.

The positive role of waist seal:

Since it was introduced from Japan in 1990s, girding has gradually become a fashion. Book waist, also called book waist, as the name implies, is when a new book is released, a layer of tape is sealed on the cover of the book. Careful readers can easily find that at first, they were very shy when they adopted waist seals. As an accessory, it is to summarize the contents of some books and print them on a small belt as abstracts for readers to buy.

Waist girding is not a big evil, and it is worth "begging" or "punishing". From the publisher's point of view, girdle is also a marketing tool, a quasi-"advertising" form, and more vividly, it is a stepping stone. Its purpose is nothing more than knocking on the door of the book market.

Over the years, the waist seal has developed vigorously and intensified, which also shows the effectiveness of publishing houses to promote products. In fact, readers can know the content and characteristics of a book most conveniently through the belt, thus helping them make a choice. Today, with more and more kinds of books, readers are afraid and hope to have such a simple way to obtain information.