What is the role of a neck strip during a haircut?

The neck strip serves a specific function in the haircutting process by creating a barrier between the skin and the cape worn by the client. This barrier helps to prevent irritation and discomfort that could occur from the fabric of the cape rubbing against the skin. Additionally, the neck strip helps in keeping hair clippings from falling directly onto the client's skin, which can be bothersome. By providing this layer, it enhances the overall comfort and cleanliness of the haircutting experience.

While the other options may relate to aspects of a haircut, they do not accurately describe the primary function of a neck strip. Supporting the head doesn't align with the purpose of the strip, and it doesn't serve as a guide for haircut length or a means to manage hair on the floor. The focus of the neck strip remains on promoting client comfort and hygiene during the service.