Let's say that you want to invest in the stock market. Choosing and investing in only one stock is risky. You can lower your risk by diversifying, or investing in lots of different stocks. However, you have some problems with this:
When you buy stocks directly, you have to buy whole shares, and you don't have enough money to buy even one whole share of all the stocks you want to invest in.
You aren't even sure which stocks you should buy.
A mutual fund solves both of these problems. You get together with other investors and pool your money together to buy a group of stocks. That way, your investment is diversified in lots of different stocks without having to have enough money to buy whole shares of each one. And the mutual fund has a manager that chooses which stocks the fund will invest in, so you don't have to pick.
There are lots of mutual funds to choose from, with as many different objectives as you can imagine. Some invest in large companies, others small; some invest in a certain sector of companies (utilities or health care, for example), some invest in stocks that pay a dividend, others are focused on growth. Some funds don't invest in stocks at all; they might invest in bonds, real estate, or precious metals. Some funds are actively managed, where the manager actively buys and sells different stocks in the fund continuously (and takes a fee for his services), and others simply invest in a list of stocks and rarely buy or sell (these are called index funds).
To answer your question, yes, the JPMorgan Emerging Markets Equity Fund is a mutual fund. It is an actively-managed stock mutual fund that attempts to invest in growing companies that do business in countries with rapidly developing economies.