The first-mover advantage refers to the competitive edge gained by a company or individual who is the first to enter a new market or introduce a new product or service. This advantage can include factors such as brand recognition, customer loyalty, and market share, which can be difficult for later entrants to overcome. By being the first to establish a presence in a market, the first-mover can set the standard and gain a significant head start over their competitors. However, this advantage is not guaranteed and must be maintained through continuous innovation and adaptation to changing market conditions.