Cyber-bullying happens when a person uses technology to hurt, threaten, tease, control or make fun of another person.
Cyber-bullying can happen by text, email, social media chat, gaming website chat, or in any other way that uses technology. It can involve posting hurtful comments or embarrassing pictures or videos of someone, or spreading rumours or lies about a person online.
It is a very public form of bullying, meaning that lots of people can see it very quickly. Depending on the method used, the content can be difficult to erase.
Cyber-bullying can have a very negative impact on some people.
For this and other reasons, it is important to think carefully about who you want to 'add as a friend' or 'follow' on social media or talk to using any other kind of technology.