The main draw for me is no commission fees on virtually any stock or ETF.
Although I did just try to buy SPXH (S&P500 + Volatility Hedge) and for some mysterious reason it was "not available for trading on Robinhood", even though it's an ETF with a not-miniscule AUM ($50M). I pinged their support about this, and it took them over a week to get back to me to ask what type of security SPXH is.
$50M is a minuscule AUM for any ETF, especially one meant for trading (volatility hedged vehicles are not good for buy and hold). Institutional investors, Hedge funds, etc will not touch such an illiquid fund.
Although I did just try to buy SPXH (S&P500 + Volatility Hedge) and for some mysterious reason it was "not available for trading on Robinhood", even though it's an ETF with a not-miniscule AUM ($50M). I pinged their support about this, and it took them over a week to get back to me to ask what type of security SPXH is.