A fiduciary is a person or organization that is legally obligated to act in the best interest of another party, typically a client or beneficiary. Fiduciaries are entrusted with managing money, property, or other assets, and must prioritize their clients’ needs above their own. Common examples of fiduciaries include lawyers, financial advisors, trustees, and company directors, who are bound by law to provide advice and make decisions that benefit those they serve.