The fund is to give everyone's money to the fund manager to help you invest and make money (of course, it may be difficult to give birth).

It is a stock fund that helps you invest in stocks (high risk, of course, it is more worry-free than buying stocks yourself, after all, there are experts to take care of it), a money fund that invests in long-term deposits (this is basically risk-free unless the bank fails), and a bond fund that invests in bonds.

Similarly, there are various funds, which are divided according to different purposes or investment objectives.