Umbrella branding involves selling many related products under a single brand name to enhance their marketability and create brand equity. It allows companies to leverage the attributes of all product lines under a trusted brand. Successful examples include Apple expanding from computers to other electronics. However, issues with a flagship product, like Nestle's Maggi noodles, can negatively impact the entire brand. Umbrella branding aims to increase customer loyalty and repeat purchases across a company's portfolio of products.