The Invesco QQQ Trust is an exchange-traded fund (ETF) that aims to track the performance of the Nasdaq-100 Index. This index includes 100 of the largest non-financial companies listed on the Nasdaq Stock Market, primarily focusing on technology and innovation-driven sectors. Investors can buy shares of the Invesco QQQ Trust on stock exchanges, making it a convenient way to gain exposure to a diversified portfolio of major companies like Apple, Amazon, and Microsoft. The fund is popular among investors looking for growth opportunities in the tech sector.