What does Telegram’s cloud-based functionality denote?

Telegram’s cloud-based functionality denote:

• Telegram is a cloud-based application. We save messages, photos, videos, and documents from your cloud chats on our servers so you can access them from any device at any time, without relying on third-party backups.
• All data is heavily encrypted, and the encryption keys are held in multiple data centres across multiple nations. Local engineers or physical invaders will be unable to access user data in this manner.

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