Obscuring or covering up one's real self or real personality, possibly due to shame or a feeling of inferiority, or a desire to fit in or be accepted
Disguise or secrecy
An attempt to control others' reactions to oneself
A desire to feel different than others or the same as others, depending on the type of wig and why the person is wearing it
An attempt or desire to express oneself differently than usual, or a desire for a temporary change
A shortcut, as a wig is a shortcut that can replace styling your own hair