How is market share used?
Market share can be interpreted along a variety of category distinctions and lines, including product pricing, geographic area, and release timing. For example, a relatively expensive, high-end car might have a large market share in the luxury auto market but still have a small sales share in the overall auto market. As another example, a carmaker could have a high market share in the U.S. but a much lower market share in other parts of the world.
Depending on how categories are broken down, a company may have more than one product or service competing for a share in the same market. For example, a beverage maker could produce multiple flavors of soda, with some offerings having a greater market share than others. On the other hand, combining sales numbers from all of the company's sodas and comparing that figure against total revenue from all players in the category may provide a better indication of how the business is performing in the space overall.