Telegram is a cloud-based messaging app that allows users to send text messages, voice messages, multimedia files, and make voice and video calls. It offers end-to-end encryption and supports group chats and channels.

Some good points of Telegram include its strong security features, large user base, and wide range of features. However, some potential drawbacks include concerns over privacy due to its default settings, occasional instances of misinformation spread through channels, and limited customer support.