Slack is a platform for team communication: everything in one place, instantly searchable, available wherever you go. The app offers all the communication tools modern teams need all in one place, like instant messaging, document sharing, and video and voice calls.
Slack's core feature is team chat. You can peek at and join any public channel or create your own channel. The app also offers private channels and direct messages (DMs), so you can talk privately to groups or individuals.