Dynamic rope is designed to stretch at a designated percentage given a static load of a designated weight (i.e. 6.5% stretch on static load of 80Kg). The reason dynamic ropes are designed to stretch is to minimize and absorb some of the impact of a fall. Dynamic ropes are used in any/all lead climbing to protect the climber by absorbing the impact of a large fall. This is the standard in rock climbing.
Dynamic ropes can be used for rappelling, top-roping and hauling gear like its cousin, the static rope, but understand that these practices will put more wear and tear on the ropes and cause them to wear out faster. With dynamic-belay ropes challenge course activities like the Pamper Pole, dynamic ropes can help absorb impact. For activities like the Giant's Ladder (a.k.a. Dangle Duo), the ropes can provide too much elongation and cause additional problems.
If you have any questions on which rope will best suite your needs, please contact us.