Why is it a companies objective to increase profit and market share?

A company has to expand year on year to satisfy those who have invested in the company. This investment is normally through purchasing shares, if the company is listed on the stock market, or by buying a direct share in the company. This could be either the directors of the company,employees, or private investors. A dividend is paid to share holders based on the companies performance. This is very important to the investors because it offers a return on their investment . The share price of a company will increase if the company is making good profit on the assets it is selling. This will also please the share holders because their investment will have increased in value.