Allowing freshly thermally styled hair to cool before brushing out generally helps the style to:

Allowing hair that has been curled or shaped with thermal tools to cool before brushing or finishing generally helps the style set and hold better, because the hair's bonds re-form as it cools in the new shape. Brushing out curls while they are still hot can relax them prematurely. This is a practical styling tip rooted in the physical behavior of hair. Understanding small technique points like cooling for hold reflects the kind of applied hairstyling knowledge the exam includes.