Inviting people to a Slack channel calls for a friendly yet clear signal. Use 👋📩 when sending a casual intro message, or 📬🔗👥 to highlight the invite link and the group aspect. In workspaces, 🔔💬👥 fits announcements about new conversations, while 📱🆕👥 signals fresh mobile members joining. These combos streamline onboarding texts, meeting invites, or quick pings in busy chats.