Multi-asset funds comprise a diverse range of investments like bonds, cash, and real estate, differentiating them from single-class investments such as stocks. Types of multi-asset funds include hedge funds, target-date funds, target-risk funds, personal portfolios, income funds, and funds of funds, each catering to different investment strategies and risk profiles. These funds provide diversification, target specific financial goals, and accommodate varying risk tolerances, making them suitable for investors at different stages of their financial journey.