How to Leave a Slack Channel
Open Slack and navigate to the channel you want to leave.
Click on the channel name at the top of the screen to access the channel settings.
In the settings menu, select the “Leave Channel” option.
Confirm your decision in the pop-up message, and you will be removed from the channel.
After leaving, you will no longer receive notifications from the channel, but you can rejoin at any time if it’s a public channel.