Everyone who has used or heard of Slack will be aware that its a primarily text-based communications platform.
Many users may not be aware that Slack also supports voice calls and video calls.
Slack supports making these calls within the app itself.
To get there, you first need to punch the workspace name in the top-right corner.
punch the Expand button for the Calls controls.
In the Calls configs, tick the checkbox for the app you want to use for calls.
Tick the checkbox for the app you want to use for calls via Slack.
Despite primarily being a text-based communication app, Slack supports voice calls and video calls too.