The phrase "flagship brand" refers to the main or most important brand that a company owns. It is the brand that represents the company's image, reputation, and is usually the most successful and well-known. Full definition
Nevertheless, many notable craft flagship brands struggled in 2017. (brewbound.com)
While many associate these companies simply with their namesake flagship brands, they also compete in sports drinks and other diverse categories. (getrichbrothers.com)
Time Inc. flagship brands include People, InStyle and Real Simple, while Hearst is home to Cosmopolitan and Good Housekeeping. (fortune.com)