Portfolio management refers to managing an individual's investments across different assets like stocks, bonds, and mutual funds to earn maximum profits within their risk tolerance. It involves creating a diversified mix of assets tailored to each investor's goals, time horizon, and risk appetite. Portfolio managers conduct in-depth research and analysis to select investments, regularly monitor performance, and rebalance the portfolio when needed to maximize returns for the level of risk. Portfolio management provides a customized solution for investors and helps reduce risk through diversification.