Illinois Cosmetology Practice Exam 2025 - Free Cosmetology Practice Questions and Study Guide

Providing hair, skin, and nail services is a primary duty of a cosmetologist because the core of cosmetology revolves around enhancing clients’ appearance and promoting their overall beauty. This encompasses various techniques and treatments, ranging from hair cutting and coloring to skincare treatments and nail services. Cosmetologists are trained to understand the different aspects of beauty services and must possess practical skills and knowledge to perform these services effectively on clients.

While marketing beauty products, managing a beauty salon, and conducting hair product research may indeed be relevant activities within the beauty industry, they do not specifically define the essential role of a cosmetologist. Marketing and management are often roles that can be filled by individuals with broader business skills, while conducting research is typically assigned to those in specialized positions, such as product developers or chemists in the beauty field. Therefore, the provision of services to clients remains the fundamental function of a cosmetologist.