Cyber-stalking is when someone uses technology like the internet, social media, or email to follow or harass another person. It's like when you play a game of tag, but instead of playing in real life, someone is following you on the computer or phone. This can be really scary because the person doing the cyber-stalking might send mean messages or post embarrassing things about you. It's important to tell a grown-up if you think someone is cyber-stalking you so they can help you stay safe. It's never okay for someone to make you feel scared or uncomfortable, especially online.