The "黃金圈" (Golden Circle) is a concept developed by Simon Sinek that explains how successful leaders and organizations communicate. It consists of three concentric circles: "Why," "How," and "What." The innermost circle, "Why," represents the core belief or purpose of an organization, while "How" describes the methods used to realize that purpose, and "What" refers to the products or services offered. This model emphasizes starting with "Why" to inspire and connect with people on a deeper level. By focusing on their fundamental beliefs, organizations can foster loyalty and engagement, leading to long-term success and a strong brand identity.