Telegram is an encrypted instant messaging and voice over IP service developed by the Russian entrepreneur Pavel Durov. Telegram Messenger is a popular cross-platform messenger application that enables users to send text messages, images, videos, audio recordings and files of any type to their contacts in real-time. The app is known for its privacy features, allowing users to set up “secret chats”, which are communications that are automatically deleted after a certain amount of time. Telegram also includes powerful features such as bots (automating tasks) and channels (broadcasting messages to multiple recipients). It supports group chat of up to 20000 members and provides end-to-end encryption for private conversations. Additionally, it supports multiple platforms including iOS, Android, Windows Phone and Desktop versions.

The main functions of Telegram are messaging, sharing media files such as videos, images, music and documents, and communications over the internet. It is a cloud-based instant messaging system that is fast and secure.

Telegram has become so popular because it is incredibly user friendly, allowing users to send messages to multiple users in a single click. It also offers advanced security features such as end-to-end encryption and two-step authentication, which makes it ideal for secure communication. The minimalist design means it is easy to use too.

Advantages of Telegram include:
End-to-end encryption providing extra security
Ability to create large group chats with up to 200 000 members
Highly integrated across all platforms (Android/ iOS/ Windows) making it easily accessible
Offers support for bots which can automate certain tasks or processes e.g., temperature sensors from an IoT device
Currently free of cost – but may eventually change its policy
Easy sharing of media files like photos, videos and documents

Disadvantages of Telegram include:
It does not have an official presence on Apple’s App Store
Limited integration with third-party applications like Google Calendar
Messages sometimes slow down due to high traffic during peak hours
Not suitable for businesses seeking higher end functions such as voice calls or video conferencing.