Cyberbullying is when a person uses technology i.e. mobile phones or the internet (social networking sites, chat rooms, instant messenger), to deliberately upset someone.
It can happen any time of day and occur on a large scale and speed, due to the nature of the technology.
Bullies often feel anonymous and 'distanced' from the incident when it takes place online and 'bystanders' can easily become perpetrators by forwarding or not reporting cyberbullying.
There is not a specific law which makes cyberbullying illegal but it can be considered a criminal offence under several different acts including Protection from Harassment Act (1997), Malicious Communications Act (1988), Communications Act (2003) Obscene Publications Act (1959) and Computer Misuse Act (1990)