Market share refers to the percentage or proportion of a particular market that is controlled by a specific company, brand, product, or service. It represents how much of the total sales or revenue in a given industry is generated by a particular player. Market share can be used as an indicator of a company's success and its ability to compete effectively within its industry. A higher market share generally indicates that a company has a stronger presence in the market, greater brand recognition, and more customer loyalty than its competitors. However, it is important to note that market share alone does not always indicate profitability or long-term sustainability, as some companies may focus on capturing market share through aggressive pricing strategies rather than generating profits.