Cyber bullying involves mean-spirited or threatening messages sent anonymously, often through electronic means like email or social media. One example is anonymous threatening emails sent to a student at home. The victim does not know who is bullying them and starts to feel isolated. The document provides advice to not read or respond to cyber bullying messages, and to block the sender or delete messages without reading them. It also shares facts about cyber bullying, such as that nearly half of kids have been bullied online and over 70% have witnessed frequent online bullying.