Stalking is a pattern of behavior directed at a specific person that causes them to fear for their safety or the safety of others, or causes them to suffer substantial emotional distress.
Stalkers use a variety of tactics, including (but not limited to) unwanted contact including phone calls, texts, and contact via social media, unwanted gifts, showing up at unwelcome times and locations, approaching an individual or their family/friends, monitoring, surveillance, property damage, and threats.
Anyone can be a victim of stalking. A majority of victims are stalked by someone they know.