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. Public channels are public to the internet, regardless of whether or not they are subscribed. A public channel is displayed in search results and has a short address (link). The main design elements of your Telegram channel include a name, bio (brief description), and avatar. Your bio should be: Activate up to 20 bots Invite up to 200 users from your contacts to join your channel
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