M1 Finance is a well-known online investment platform that has been around for a few years. But is it legit? In this M1 Finance review, we’ll take a look at the pros and cons of using the platform to invest your money.M1 Finance is an online investment platform that allows you to invest your money in stocks and ETFs. You can choose from a variety of different portfolios, or you can create your own. The platform is free to use, and there are no fees for buying or selling stocks.