Quick Answer: Robinhood is a commission-free trading and investing platform that lets you buy and sell stocks, ETFs, options, futures, cryptocurrency, and prediction market event contracts — all in one app. It makes money primarily through payment for order flow (PFOF), interest on uninvested cash and margin loans, and a premium subscription called Robinhood Gold ($5/month). In 2026, Robinhood has expanded significantly beyond its original stock-trading roots, adding AI-powered investing tools (Cortex), agentic trading, prediction markets, a Gold credit card, retirement accounts with IRA matching, and banking services with $2B+ in deposits. Assets under custody have crossed $143.6 billion.