Final answer:
When using a blow dryer for styling hair, the airflow should be directed downwards which aligns with hair growth to achieve sleek and smooth results.
Step-by-step explanation:
In the context of hair styling and proper technique for using a blow dryer, the airflow should typically be pointed downwards in the direction of hair growth. This technique helps to smooth the hair cuticles, which can reduce frizz and enhance the hair's shininess. To accomplish smooth results, one should move the blow dryer from the roots to the ends of the hair, following the natural fall of the hair. Pointing the airflow upwards could potentially create more frizz and tangles. It is not recommended to direct the airflow towards the face or towards the back as it can be uncomfortable and less effective for styling.