Answer:
A company's market share is its sales measured as a percentage of an industry's total revenues. Company market share is the percentage of the total target market for your product that belongs to your company.
it can be calculated by sales income, or the number of sales.
credits -
https://www.investopedia.com/ask/answers/033015/how-do-i-determine-particular-companys-market-share.asp#:~:text=A%20company's%20market%20share%20is,company%20relative%20to%20the%20industry.