In online communication, a troll is a person who intentionally posts controversial, provocative, or distracting messages to anger, offend, or elicit a reaction from others. Trolls are often active on social media, forums, comment sections, and other online communities. Their behavior can range from harmless pranks to serious harassment and bullying. Trolling can disrupt dialogue and create a negative online environment. Many online platforms have implemented policies and moderation tools to combat trolling and promote respectful and constructive communication.