what is meant by stop loss?

stop loss ap k loss ko kam karta ha fix loss hota ha trade mei jab bhi koi trade open karte hain humain ys pr stop loss aur take profit lazmi lgana cahiay kiu k is ka faida ye hay k is se humara account save ho jata hay aur humain apne account ko wash hone ka koi dar nai hota is liay main samjhti hun humain stop loss aur take profit ka istmal laZmi karna cahiay take humara account save rahey