A stock market, also known as a share market, is a platform where publicly traded companies' stocks are bought and sold. When a company wants to raise capital, it can issue stocks, which represent ownership in the company. Investors can then buy stocks in the company, either as a long-term investment or with the goal of selling them at a later date for a profit.

The stock market is a key component of the financial system, as it allows companies to raise capital and investors to buy and sell ownership in those companies. The stock market can also serve as an indicator of the overall health of the economy, as the performance of publicly traded companies can provide insight into the broader business climate.

There are many different stock markets around the world, including the New York Stock Exchange (NYSE) and the NASDAQ in the United States. Stock markets operate through a network of brokers and dealers, who facilitate the buying and selling of stocks on behalf of investors.

Investing in the stock market carries inherent risks, as the value of stocks can fluctuate due to a variety of factors, including economic conditions, company performance, and market trends. It is important for investors to carefully consider their investment goals and risk tolerance before buying stocks.