The advantages of mutual funds:
some funds specialize in areas that the average investor would have a difficult time investing in, such as stocks of foreign countries and stocks of small cap companies for example.
mutual funds allow for diversification without having to buy a bucket of stocks.
easy to purchase and sell for the small investor.
disadvantages:
70% of mutual funds under perform the market in general. Not a great record.
many mutual funds are bloated. It is difficult to invest a billion dollars.
mutual funds have to declare and pay capital gains once a year on which one will have to pay taxes. If you buy and hold a sound quality stock, that is not the case.