Name the popular technique for nail designs that involves stamping.

Nail art stamping is a widely recognized technique in nail design where patterns or images are transferred from a plate to the nail using a stamping tool. This method involves a specially designed metal plate that contains etched designs. A stamping polish is applied to the plate, and then a scraper is used to remove excess polish, allowing the design to remain in the etched portions. A rubber stamper is then pressed onto the plate to pick up the design, which can be gently rolled onto the nail for a clean and precise application. This technique is popular due to its efficiency and the ability to create intricate designs without the need for freehand painting skills.

While nail art painting refers to freehand drawing or painting on the nails and nail sculpting involves building up the nail shape with products like acrylics or gels, nail art stamping specifically highlights the use of pre-designed images for quick and effective nail art. Nail layering, on the other hand, focuses on applying different colored products or designs in layers rather than using stamps to create images. Hence, nail art stamping stands out as the correct option for this question.