A Secondary Market is a financial market where investors buy and sell previously issued securities like stocks and bonds.
In the Secondary Market, securities that were issued earlier (via IPO or other methods) are traded among investors. The company that issued the securities does not receive money from these transactions.
Trading takes place on exchanges like the National Stock Exchange and Bombay Stock Exchange, regulated by the Securities and Exchange Board of India.
"When you buy shares of a listed company from the stock exchange, you are participating in the secondary market."