The iShares Russell 2000 ETF is an exchange-traded fund that aims to track the performance of the Russell 2000 Index. This index represents the smallest 2,000 companies in the Russell 3000 Index, which includes a broad range of U.S. stocks. The ETF provides investors with exposure to small-cap stocks, which can offer growth potential and diversification. Investing in the iShares Russell 2000 ETF allows individuals to buy shares that represent a collection of small companies across various sectors. This can be a convenient way for investors to gain access to the small-cap market without having to purchase individual stocks.