Stop orders are orders that are activated only when an asset exceeds a specific market price point. from that price, the stop orders become Market Orders that are executed at the best available price.
Example: If you want to exchange 2 Bitcoin (BTC) for Tether (USDT) through a Stop Order, the exchange rate is set (in this example) with a limit of 9000 USDT x BTC, a market order will be created when The market exchange price reaches that amount.