What a Slack channel is and why you'd create one

A channel on Slack is a dedicated space where a group of people can message each other about a specific topic. Think of it like a group chat, but organized by subject instead of by who happens to be online. You create channels to keep conversations separate — one for your project team, another for announcements, another for random jokes — so people can follow what matters to them without drowning in unrelated messages.

When you create a channel, you decide who can see it and who can join. Some channels are public, meaning anyone in your Slack workspace can find and join them. Others are private, meaning only people you invite can see them. The person who creates a channel becomes its owner and can change these settings later.

Key Takeaways

  • You create a channel by clicking the plus icon next to "Channels" in the left sidebar, typing a name, and choosing whether it is public or private.
  • Channel names must be lowercase, cannot have spaces, and work best when they describe what the channel is for — like #project-launch or #design-feedback.
  • After you create a channel, you can invite specific people to join it or leave it public so anyone in your workspace can find it.
  • The person who creates a channel can change its settings, description, and topic at any time, and can remove people or delete the channel if needed.

How to create a channel step by step

Open Slack on your computer or phone. On the left side of the screen, you will see a list of channels you are already in. Above that list, look for the word "Channels" with a plus sign next to it. Click or tap that plus sign.

A window will pop up asking you to name your channel. Type a name that describes what the channel is for. Use lowercase letters and hyphens instead of spaces — for example, #quarterly-planning or #customer-feedback. Slack will not let you use uppercase letters or spaces, so it will convert them automatically. Keep the name short and clear so people understand what they will find there.

Below the name field, you will see a checkbox that says "Make it private." If you leave this unchecked, the channel will be public — anyone in your workspace can find it and join. If you check this box, the channel will be private — only people you invite can see it or join. Choose based on whether this conversation should be open to everyone or limited to a specific group.

Click the "Create" button. Your channel is now live. Slack will open it automatically and show you an empty message area with a field where you can type.

Adding people to your new channel

If you created a public channel, people can find it themselves by clicking "Browse channels" in the left sidebar and searching for the name. They can join without asking permission. If you created a private channel, you need to invite people directly.

To invite people to a private channel, look at the top of the channel window. You will see the channel name and a small icon that looks like a person with a plus sign. Click that icon. A menu will appear where you can type the names or email addresses of people you want to invite. Select each person and click "Add." They will receive a notification that they have been added to the channel.

You can also invite people to a public channel the same way, even though they could join on their own. This is useful if you want to make sure certain people know the channel exists.

Naming your channel so people understand it

The channel name is the first thing people see, so it should tell them what the channel is about. Use names like #marketing-campaign, #bug-reports, #random, or #client-abc-project. Avoid names that are too vague, like #stuff or #team, because people will not know whether to join.

If your workspace has many channels, consider starting related channels with the same prefix. For example, #project-timeline, #project-budget, and #project-team all make it obvious they belong together. This also makes them appear next to each other in the channel list.

You can change the channel name later if you realize it was not clear enough. Click the channel name at the top of the window, select "Edit channel details," and change the name. Everyone in the channel will see the new name when ready.

Setting a description and topic for your channel

After you create a channel, you can add a description and a topic to give people more context. The description is a longer explanation of what the channel is for. The topic is a short phrase that appears at the top of the channel and can be updated quickly — for example, "Q4 planning — important date Friday" or "Waiting on client feedback."

To add these, click the channel name at the top of the window. Select "Edit channel details." You will see fields for "Description" and "Topic." Type what you want and click "Save." The description will appear when someone hovers over the channel name. The topic will show at the top of the channel for everyone to see.

Making a channel private or public after creation

If you created a public channel and later decide it should be private, you can change it. Click the channel name at the top, select "Edit channel details," and look for the privacy setting. You can switch it from public to private. When you do this, people who were already in the channel stay in it, but new people can no longer find it or join on their own.

Switching from private to public is also possible, but be aware that the entire message history will become visible to everyone in your workspace. If the channel contains sensitive information, think carefully before making this change.

Removing people and deleting channels

As the channel owner, you can remove people from a private channel if needed. Click the channel name at the top, select "Members," find the person you want to remove, and click the X next to their name. They will no longer see the channel or its messages.

If you want to delete the entire channel, click the channel name at the top, select "Settings," scroll down, and look for "Delete this channel." Only the channel owner can delete it. Once deleted, the channel and all its messages are gone and cannot be recovered, so be certain before you do this. If you just want to leave a channel without deleting it, you can click "Leave channel" instead.

Frequently Asked Questions

Can I change a channel name after I create it?

Yes. Click the channel name at the top of the window, select "Edit channel details," and type the new name. Everyone in the channel will see the change when ready. The old name will no longer work, but the channel and all its messages stay the same.

What happens to messages if I delete a channel?

All messages in the channel are deleted permanently and cannot be recovered. If you think you might need the messages later, consider archiving the channel instead of deleting it. Archived channels are hidden but their messages remain searchable.

Can I invite someone to a channel if they are not in my Slack workspace?

No. Everyone you invite must already be a member of your Slack workspace. If someone is not in the workspace yet, a workspace owner or admin must add them first.

What is the difference between a channel and a direct message?

A channel is a group conversation about a topic that multiple people can join and follow. A direct message is a private conversation between you and one other person. Channels are better for team discussions; direct messages are better for one-on-one talks.

Can I see channels I am not a member of?

You can see public channels in the "Browse channels" list even if you have not joined them. You cannot see private channels unless you are invited. Once you join any channel, it appears in your left sidebar.