What exactly do you invest my money in and how are the ETFs selected?

Your money is specifically invested in Exchange Traded Funds (ETFs) that cover different asset classes (e.g. global stocks, European bonds, etc.). The choice of ETFs is made according to criteria like costs, tracking quality, and liquidity. This way, you get a wide-ranging portfolio: for example, shares in thousands of companies worldwide through stock ETFs and a wide variety of bonds through bond ETFs. The goal is to optimally diversify your wealth.