What are shelf-talkers?

This Web site provides copywrite free text librarians can use in their "shelf talkers."

Retailers such as grocery stores use small signs attached to shelves to promote specific products. These signs are called "shelf-talkers."

Bookstores use shelf-talkers to promote specific titles. "Staff recommends" signs are the most common shelf-talkers in bookstores.
Librarians are using shelf talkers to promote specific books and authors.