Cyberbullying involves using technology like email, social media, or cell phones to deliberately harass or threaten others. It differs from traditional bullying in that the bully can remain anonymous and the harassment has no limits of time or place. Common types of cyberbullying include flaming, harassment, denigration, impersonation, outing and trickery, exclusion, and cyberstalking. Cyberbullies may bully to feel powerful, for revenge, to entertain themselves, or without meaning to cause harm. Schools must recognize cyberbullying and enforce policies to protect students both online and offline.