Final answer:
Maintaining a professional appearance is important for contributing to professional demeanor, setting expectations of behavior, and building credibility.
Step-by-step explanation:
Maintaining a professional appearance is important for several reasons. Firstly, it helps to contribute to your professional demeanor, making you appear more reliable and competent. Secondly, it allows others to know how to behave toward you, setting clear expectations of professionalism. Finally, while it may not guarantee your identification as an IT professional, presenting yourself professionally can help create a positive impression and build credibility in your field.