The purpose of a Pink and White Missing Person Poster is to help spread awareness and gather information about a missing person. The poster includes a clear photo, physical description, and details about when and where the person was last seen. It also provides contact information for authorities or loved ones to be contacted if someone has information on the missing person's whereabouts. By distributing these posters in high-traffic areas and sharing them through social media, the hope is to reach as many people as possible so that the missing person can be found and brought home safely.