What Is Slack? And Why It’s the Go-To Tool for Teams

What is Slack? It’s a cloud-based communication hub built for productivity with instant messaging, voice and video calls, and numerous app integrations.

Slack Workspaces and Channels
A Slack workspace is a team’s home base for collaboration. It’s a dashboard that includes all the productivity tools and channels for communication.
Slacks allows free workspaces, which are appropriate for small to medium companies or teams. Once you create a workspace, you can invite other members to join it.
Each workspace user becomes a part of the global directory. All workspace members can communicate directly with one another through direct messages or via one of the channels.

Use Slack Messaging and Calls
If you’re creating a new Slack workspace, invite users to become part of it. If you’re joining a workspace, you’ll need to receive an invitation first.
Once you’re a member, messaging in Slack is easy and intuitive. You’ll see a list of channels and direct message contacts from the side menu on the left side of the app.
Select a channel or a direct message between you and another member to see the messaging history in the center window.

Slack App Integration
For more advanced Slack functionality, workspace administrators can integrate other apps, including Google Drive and Dropbox, to streamline file sharing.
Use a variety of bots to handle other tasks, such as pulling in data from external tools or creating quick surveys. Slack also offers various automations to streamline daily or regular tasks.
While these app integrations aren’t a core part of Slack, they make the platform more versatile than other apps dedicated solely to communication.

Credit : https://www.lifewire.com/what-is-slack-11707236