These days, a large majority of new products tens of thousands of them every year are extensions of already-successful brands. Compared with building new brands, extensions can create immediate new-product familiarity and acceptance. For example, it’s not just any new wireless charging mat for your mobile device, it’s a Duracell Powermat. And it’s not just a new, no-name over-the-counter sleep-aid, it’s Vicks ZzzQuil. Extensions such as the Duracell Powermat and Vicks ZzzQuil make good sense—they connect well with the core brand’s values and build on its strengths.