What does "layering" refer to in haircutting?

Layering in haircutting refers to cutting the hair at different lengths, which is a technique used to create volume and movement in a hairstyle. This method adds dimension and texture, allowing for more versatile styling options. When hair is layered, the shorter pieces can help lift the longer strands, enhancing body and bounce. The contrast between the various lengths can also result in a more dynamic look, making the hair appear fuller and more lively.

The other options do not encapsulate the essence of layering. Cutting hair at the same length would result in a blunt or uniform look, lacking the depth and movement that layering provides. Applying products in layers pertains to styling rather than cutting techniques. Lastly, trimming hair for a uniform appearance would not involve varying lengths and would not contribute to the volume or movement associated with layering.