The stiff leg deadlift exercise is very similar to the traditional deadlift, however, performing the deadlift with straight legs means the hamstrings are targeted. With this exercise you are lifting the weight by using the legs as opposed to the traditional deadlift where you would lift with the back.
This is a compound pull exercise that mainly works the lower body, including your hamstrings and glutes. The stiff leg deadlift also works your back muscles and core.