WhatsApp Messenger is a communication app used for private messaging voice and video calls and sharing media securely.

Download WhatsApp Messenger from Google Play Store or Apple App Store then follow installation instructions.

After opening enter your phone number verify it and start messaging contacts who use WhatsApp.

Key features include end-to-end encryption voicevideo calls group chats and status updates.

Customize notification settings chat wallpaper and privacy options via the app settings menu.

Save favorite content by starring messages in chats for quick future reference.

Share content by selecting the forward option and choosing contacts or social media platforms.

Access detailed info by tapping on specific chats or exploring linked documents and media.

WhatsApp needs permissions for camera microphone and storage which can be managed in device settings.

Check for updates via your device's app store to ensure smooth performance and new features.