A unit of ownership interest in a corporation or financial asset. While owning shares in a business does not mean that the shareholder has direct control over the business' day to day operations, being a shareholder does not entitle the posseser to an equal distribution in any profits, if any are declared in a form of dividends. The two main types of share are common shares and preffered shares.

Dont know how to sell shares. sorry
Share is a part or portion of a larger amount which is divided among a number of people, or to which a number of people contribute.