A first impression is the opinion someone forms about you when they first meet you. This opinion is either formed in a good way or a bad way. When someone is forming this opinion of you they are looking at your attire, facial expressions, posture, and overall mannerism.
There are several pros and cons of forming first impressions. The pros are this impression lasts forever, and it sets the tone for the relationship with the person to follow. It can be your acceptance into society. The cons are you only get one first impression, and if you don’t make a good one it is nearly impossible to take back.