iShares is a brand of exchange-traded funds (ETFs) managed by BlackRock, one of the largest investment management firms in the world. These funds allow investors to buy shares that represent a collection of assets, such as stocks or bonds, making it easier to diversify their portfolios. iShares offers a wide range of ETFs that track various indices, sectors, and asset classes. This provides investors with options to invest in specific markets or strategies, catering to different risk tolerances and investment goals. The funds are traded on stock exchanges, similar to individual stocks, providing liquidity and flexibility.