A stalker is someone who persistently follows or harasses another person, often causing fear or distress. This behavior can include unwanted communication, monitoring, or appearing uninvited at the victim's home or workplace. Stalking can occur in various forms, including physical presence, digital harassment, or through third parties. Stalking is considered a criminal offense in many jurisdictions and can have serious legal consequences. Victims of stalking may experience anxiety, depression, and a sense of helplessness. Organizations and hotlines, such as the National Center for Victims of Crime, provide resources and support for those affected by stalking.