Answer: stop loss means guarantee loss. Traders are used because to protect their capital. If market is going against the position, stop loss required to save the capital.
Target means take profit, Trader should ensure to set up trade by his predefined plan stop loss and target. sometime what happened with beginners, market is going his for and giving profit but trader cannot book profit and thinking market give more and more profit.so take profit should be required to set up a trade.
How to set up stop loss and take profit and Briefly explained in trading video and strategy in my trading educational course.click here to learn more stop loss placement method