The optimal dimension of the avatar on Telegram is 512px by 512px, and it’s recommended to use PNG format to deliver an unpixelated avatar. Informative How to Create a Private or Public Channel on Telegram? A Telegram channel is used for various purposes, from sharing helpful content to implementing a business strategy. In addition, you can use your channel to build and improve your company image, boost your sales, make profits, enhance customer loyalty, and more. How to create a business channel on Telegram? (Tutorial)
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