Login or register (free and only takes a few minutes) to participate in this question.
You will also have access to many other tools and opportunities designed for those who have language-related jobs (or are passionate about them). Participation is free and the site has a strict confidentiality policy.
Explanation: According to the Ariel Diccionario de términos de marketing, publicidad y medios de comunicación. Rather than referring to a shelf as such, I think it means the "gondola" shaped displays of products used at hypermarkets to attract consumers' attention.