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). But a Telegram statement also said: "Any requests related to political censorship or limiting human rights such as the rights to free speech or assembly are not and will not be considered." The Channel name and bio must be no more than 255 characters long How to Create a Private or Public Channel on Telegram? Add up to 50 administrators
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