This document discusses introducing and evaluating brand extensions. It defines brand extensions as using an established brand name to introduce a new product. Successful extensions create similarities and differences between the extension and parent brand. Marketers must evaluate extensions based on consumer knowledge of the parent brand and the likelihood the extension enhances or harms the parent brand's equity. The key steps are defining consumer brand knowledge, identifying extension candidates, evaluating candidates, designing marketing programs, and assessing the extension's performance and impact on the parent brand.