**How does end-to-end encryption work in Messenger services, and which services offer this feature?
2. **What are the common privacy concerns associated with using Messenger services, and how can users safeguard their personal information?
3. **What are the differences between Messenger services such as WhatsApp, Facebook Messenger, and Telegram in terms of features and target audience?
4. **Can Messenger services be used for business purposes, and what tools do they offer to facilitate customer communication and support?
5. **How do Messenger services handle spam and unwanted messages, and what can users do to manage or report them?
