🚫 External link (for example, to the site).
For the button, only links to the channel, post (without using abbreviators) and bot (can be with start parameters like /start or /help) are allowed.
🚫 Abbreviated link Only full links can be used, you can't run through shorteners.
🚫 Additional attention to the button You can't use special characters and emoji in front of the button, which will be a call for the user to click on it.
✅ Start parameters for the bot You can add any start parameter (like /start or /help) to the bot link.
Content (in Telegram-channel, posts, adverts and other placements)