Investing in a mutual fund is like an investment made by a collective. An individual as a single investor is likely to have lesser amount of money at disposal than say, a group of friends put together. Now, let's assume that this group of individuals is a novice in investing and so the group turns over the pooled funds to an expert to make their money work for them. This is what a professional Asset Management Company does for mutual funds. The AMC invests the investors' money on their behalf into various assets towards a common investment objective.