Note investing provides several advantages for investors including consistent cash flow from monthly payments, collateralization of the investment through ownership of the underlying property's title in case of default, and opportunities for high returns by purchasing discounted notes and managing them strategically. It also allows for diversification of investment portfolios, control over the investment strategy to optimize returns, and can serve as a passive investment requiring less hands-on management than traditional real estate. Timing note purchases to favorable real estate market conditions can further enhance profitability.