A fiduciary financial advisor makes investment decisions with your best interest in mind, while a financial advisor who isn't a fiduciary may recommend products for which they receive a commission or other form of payment.
Not all financial advisors are fiduciaries. Those who are not make recommendations for products that charge fees and commissions. Working with a fiduciary advisor means they are obligated to make recommendations that benefit you. Similarly, they’re required to be fee-based – meaning they can’t accept commissions for the investments you make. This rule exists to help reduce any potential conflict of interest that may arise in investment decisions.