This document discusses brands, branding, and metrics for measuring brand performance. It defines what a brand is and explains that branding is the process of creating a unique name and image for a product through consistent advertising. The document also introduces the Brand Development Index (BDI) and Category Development Index (CDI), which are metrics for measuring a brand's sales performance within specific customer groups relative to its overall performance. A brand's BDI and the category's CDI in a given market segment can reveal strengths, weaknesses, and potential for that brand and category.