Investing in tax-benefit funds in Thailand, like retirement mutual funds (RMFs) and super saving funds (SSFs), is popular because it helps inexperienced investors grow their money without needing to do a lot of research. These funds let investors put in a small amount of money and get more back. RMFs are good for saving for retirement and getting tax breaks, while SSFs are for long-term investments with tax benefits. Both types of funds are tax-free and promoted for retirement savings.