Online messaging groups are chat spaces where members exchange messages, files, and links, often in semi-private or private settings. They may be hosted in messaging apps, social platforms, or workplace tools, with access controlled by invitations, membership settings, or administrators.
In cybersecurity, group features can help harmful content or malicious links spread among multiple users, while private or fragmented conversations may make detection and moderation more difficult. Attackers can also use groups to coordinate activity or distribute phishing links and malware. Defenses include user reporting, moderation and abuse-response processes, controls on invitations and file sharing, and preserving relevant evidence for investigation. Group privacy does not by itself indicate wrongdoing, and the specific risks depend on a service’s design and how it is used.