There are two types of chats on telegram one is standard and a part of Telegram Cloud and other is Secret Chat. Now what is the difference, the Secret Chat of the telegram is an end to end encrypted just like the normal chat, however, the difference is it will not save of Telegram Cloud. The secret chat store only on the device from where it has been initiated, for example, if I have started some secret chat on a smartphone then it will not be available on other devices Telegram app running with mine Telegram account example Windows Desktop. This means everything will be in my pocket secure and safe. Also, when you delete messages on your side of the conversation, the app on the other side of the secret chat will be ordered to delete them as well. Means no trace. Furthermore, you can set your messages, photos, videos and files to self-destruct in a set amount of time after they have been read or opened by the recipient. The message will then disappear from both your and your friend's devices.