Click on "Add channels" at the bottom of your channel list in your left sidebar menu

Type the name of your new Slack channel. \
Leaving a space between words will automatically create a hyphen in the name.

Select the channel visibility (Public or Private)

slack.com

This guide provides a step-by-step process for creating a channel in Slack. By following these instructions, users will be able to easily create a new channel, set its visibility, and invite members. This guide is helpful for anyone who wants to effectively organize conversations and collaborate with a specific group of people in Slack.