Telegram is a cloud-based mobile and desktop messaging app that you can use for messaging as well as making voice or video calls.
Telegram is particularly popular among users to create groups and have private discussions within a closed group. The app has grown over the years and has become like a social app that is preferred by many users over top popular social apps.
You can use Telegram for sending text messages, making voice and video calls. Also, it gives you the option to share photos, files, videos, etc.