The Channel name and bio must be no more than 255 characters long 5Telegram Channel avatar size/dimensions To upload a logo, click the Menu icon and select “Manage Channel.” In a new window, hit the Camera icon. Image: Telegram. Avoid compound hashtags that consist of several words. If you have a hashtag like #marketingnewsinusa, split it into smaller hashtags: “#marketing, #news, #usa.
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