When you sign up with any robo-investing platform, you'll answer a few questions about the type of investor you are and your financial plan. You'll likely have to consider factors including your risk tolerance, expense ratio, minimum investment and when you plan to cash out your investments -- each factor should influence which investment option the robo-advisor will choose. This provides the robo-investing platform with the information it needs to build the ideal investment portfolio for you, which will continue to evolve as the markets and your investment options, financial plan, risk tolerance and overall finances change.  It will also help the robo-advisor make sure you have a diversified portfolio best set up to achieve your financial goals, such as earning enough money to add to your retirement account or paying off student loans. Interactive robo-advisors can also help you make sense of your investment options and better understand concepts like socially responsible investing. These are available on multiple platforms now, including two of the biggest names in this space: Betterment and Wealthfront.