A successful Design System is a master toolkit that tells everyone exactly how the brand should look and feel. It keeps every piece of branded content consistent, easy to build, and unmistakably recognizable. A social post, OOH placement, or business card should feel like matching luggage across all lines of business, as well as regional territories.
Core brand colors, typography, logo placement, and even photography principals are all important factors in brand recognition. Especially with platform specific content, where UI is always in constant evolution.