VOO tracks the S&P 500, offering broad exposure to 500 of the largest U.S. companies. It's cost-effective with a low expense ratio, making it popular for long-term investors. The fund provides diversification and has a solid performance history aligned with the overall U.S. market. However, it's heavily weighted in large-cap stocks, leaving out small-cap growth opportunities. This makes it less suitable for investors seeking sector-specific or high-growth, high-risk investments.