Umbrella branding involves marketing multiple related products under a single brand name. It allows companies to build strong brand equity and recognition for a master brand. Amul and Nivea are examples of successful umbrella brands - Amul markets various dairy products under its parent brand while Nivea has a vast portfolio of cosmetic products. The key benefits of umbrella branding include leveraging the existing brand image to introduce new products more easily and at lower cost. However, it also carries the risk that issues with one product could negatively impact perceptions of the overall brand.