The term "Partner Brands" refers to a group or collection of companies that have formed an alliance, partnership or strategic relationship with another company in order to jointly develop and market products or services. These partner brands work together towards common goals such as increasing their customer base, expanding into new markets, sharing resources, reducing costs, and improving overall efficiency. The idea is that by combining forces, both companies can benefit from the association with each other's brand names, reputations, and customer bases.