What is the purpose of blow drying hair?

The primary purpose of blow drying hair is to remove moisture and style it. When hair is washed, it retains a significant amount of water, and blow drying helps to evaporate that moisture quickly, which is essential for styling. The heat from the blow dryer allows the hair cuticles to open up, making it more manageable for styling techniques such as curling or straightening. Additionally, blow drying enables better control over the hairstyle being created, allowing hairstylists to achieve the desired look efficiently.

While other options may touch on aspects of blow drying (setting hair, preparing for cutting, or adding volume), they do not encapsulate the primary effect of the blow drying process, which is effectively moisture removal combined with the initiation of styling.