They want to impress them so that those people will want to take them to themselves and never let them go. Rather than being taught to accept themselves, they were trained to make themselves SO socially acceptable to others that that is their only focus. Parents play a primary role in creating this drive for acceptance in you. The desire for acceptance is normal, but the drive for acceptance is excessive. That drive comes from the idea that you must never fail to impress those who are important to you.
Perfectionism is rooted in the foolish and futile attempt to do the impossible for dubious reasons.
It creates anxiety and makes each day stressful. It wastes time and energy. It is very difficult for a perfectionist to create a close relationship with anyone. When you are never satisfied with yourself, you can never rest. You may even resent the folks you are trying so hard to please.