Telegram says it has 500 million users worldwide. Most use the app to chat, but there's more to it than that.
BBC World Service Disinformation reporter Jack Goodman takes a look at what's behind the rise of Telegram.
The BBC documentary, 'Telegram: Why won't you take my naked photos down?' will be published later this week.
Motion graphics by Jacqueline Galvin.
Produced by the Reality Check digital video team.
Artmotion UK
