“There is no reason to be alive if you can’t do DEADLIFT” John Pall Sigmarsson: 4x winner of the World’s Strongest Man Competition.
Deadlifts are one of the most important exercises in the Crossfit Spectrum, and in strength and conditioning in general.
Correctly done they will help you to build massive strength in your posterior chain and you will need that for all your weightlifting. It is also the exercise that allows your body to move the most weight. But as with every heavy lift, progress and avoiding injury lies in great technique.