- used by manager to judge effectivness of marketing campagains and marketing strategies.
 - A higher market sharei s desirable
 
WHY YOU WANT TO BE THE MARKET LEADER
- set trends that other companies will follow (i.e. Apple removing charging brike)
 - attract more investors, and higher quality employees
 - high market share implies brand loyalty, so customers will pay higher prices
 - you get economies of scale.
 - grocery stores are more likely to hold your inventory (i.e. coca cola)
 - make it harder for new competitors to emerge