There are several reasons why corporations, or more specifically their management teams, care about their company's stock price and want it to perform well in the market.
For a publicly traded company, its stock price can often be a barometer for the company's health. There are exceptions to this rule, but a company's stock price reflects investor perception of its ability to earn and grow its profits in the future. Typically, the higher the stock price, the more optimism about the company's prospects.
A healthy stock price is a barometer for a company's financial health. Financial analysts are constantly scrutinizing a company's earnings performance and expected future earnings. Analysts and investors look favorably on companies with well-performing stock prices along with a track record of solid earnings. Many financial ratios use the stock price of a company in their calculations. For example, the price-to-earnings ratio, or P/E, measures whether a company's stock price is appropriately valued relative to earnings.
Source : Investopedia