The Channel name and bio must be no more than 255 characters long The Standard Channel 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. The visual aspect of channels is very critical. In fact, design is the first thing that a potential subscriber pays attention to, even though unconsciously. Telegram message that reads: "Bear Market Screaming Therapy Group. You are only allowed to send screaming voice notes. Everything else = BAN. Text pics, videos, stickers, gif = BAN. Anything other than screaming = BAN. You think you are smart = BAN.
from us