The document provides guidance on using ONIX (Online Information Exchange) data to improve book marketing. It recommends: 1) owning your book data by creating your own ONIX files; 2) keeping data up-to-date as information changes; and 3) including enhanced data like contributor biographies, reviews, and regional relevance in ONIX files to help sell more books. It then gives specific examples of how to include important metadata like Canadian contributors, regional codes, audience information, awards, and descriptive text in ONIX files.