Investment accounts are financial accounts that allow individuals to buy and sell various types of investments, such as stocks, bonds, and mutual funds. These accounts can be opened through financial institutions like banks or brokerage firms, and they help investors grow their wealth over time by earning returns on their investments. There are different types of investment accounts, including brokerage accounts, retirement accounts like IRAs and 401(k)s, and education savings accounts. Each type has its own rules regarding contributions, withdrawals, and tax implications, making it important for investors to choose the right account based on their financial goals.