Telegram is a cloud-based messaging application that allows users to send messages, photos, videos, and other files to other Telegram users. It was launched in 2013 by brothers Pavel and Nikolai Durov and has since gained popularity for its privacy and security features.

Telegram uses end-to-end encryption for secret chats, which are self-destructing and can only be accessed on the devices involved in the chat. It also offers features such as group chat, video calling, voice calling, and the ability to create public or private channels for broadcasting to large audiences.

In addition to personal messaging, Telegram is also used for business communication and has features such as bots, which can automate tasks such as customer service and content delivery.

Telegram is available for free on both Android and iOS devices, as well as on desktop computers through a web browser or dedicated app. Unlike some other messaging apps, Telegram is ad-free and does not collect user data for advertising purposes.