Workspace
The whole Slack home for a company, team, client project, or community.
Mental model
Slack is a workspace made of conversations.
Think of Slack as a searchable office: public rooms for team work, private chats for sensitive or quick matters, threads for side conversations, and live tools when typing is too slow.
Channels
Dedicated spaces for teams, projects, topics, announcements, or support queues.
Direct messages
Private one-to-one or small group conversations for focused coordination.
Threads
Replies attached to one message, so deeper discussion does not flood the channel.
Interface map
What to click when you open Slack.
The desktop app is built around a left sidebar, the active conversation, and quick actions in the header or message field. Activity is where Slack gathers mentions, reactions, thread replies, and app notifications.
# launch 10 membersAdd tab +
Topic, canvas, files, bookmarks, and huddle access live up here.
Message #launch
+BI@emoji>
Decision guide
Where should this message go?
The fastest way to improve Slack is to choose the right surface before typing. Most confusion starts as a message posted in the wrong place.
Who benefits from seeing this later?
#Team, project, topic: use a channel.
DMOne person or a private matter: use a DM.
TOne existing message: reply in thread.
Is this urgent, durable, or live?
@Needs a person: mention them directly.
CLong-lived reference: put it in a canvas.
HNeeds voice: start a huddle.
How noisy will this be?
okFYI: channel post, no broad mention.
!Blocker: mention the owner and context.
...Back-and-forth: thread or huddle.
Messaging
Write messages that move work forward.
A useful Slack message is not just text. It tells people what the topic is, who is needed, what decision or action is next, and when it matters.
1
Context
Name the project, customer, bug, meeting, or decision.
2
Ask
Say what you need: review, approve, answer, unblock, decide.
3
Owner
Use @mentions sparingly, for the specific person needed.
4
Timing
Add a deadline or urgency so people can prioritize.
Threads
Use threads to keep the channel readable.
Threads are best for detailed replies, edits, side questions, and "me too" follow-ups. If the answer matters to everyone, summarize the outcome back in the channel.
# campaignChannel view
N
Nina
The landing page is ready for final review. Please keep copy edits in the thread and post blockers here.
6 replies
D
Devon
@Nina blocker: analytics script is still missing from the thank-you page.
eyes 1priority
M
Maya
Fixed. Final QA can continue.
check 4
ThreadSide panel
N
Nina
Landing page ready for review.
Copy edit: swap "simple" for "clear" in the hero.
Approved from brand.
Legal note added to the footer.
Summary posted back to channel: final copy approved.
Notifications
Make Slack loud only when it should be.
Slack notifications are designed to surface direct messages, mentions, followed thread replies, keywords, and selected channel activity. Tune them so important work rises without every channel becoming an alarm.
Activity
@mention from MayaNeeds your pricing approval today
1
Thread replyQuestion on the launch checklist
2
Keyword match"renewal" appeared in #sales
1
ReactionSomeone reacted to your update
new
App notificationBuild passed in GitHub
ok
Immediate
DMs and @mentions
Use direct mentions when someone specific must see the message. Avoid broad mentions unless the whole channel truly needs an interrupt.
Followed
Threads you started, joined, or were mentioned in
Thread replies can notify you when the discussion is connected to your work.
Custom
Channel keywords
Track names, customers, incidents, and products without turning on every post in every channel.
Quiet
Mute or adjust noisy channels
For busy channels, switch to mentions-only, mute them, or check them intentionally from the sidebar.
Live and durable work
When typing is not enough, switch tools.
Huddles are for quick real-time discussion. Canvases are for information that should outlive the message stream, like notes, project briefs, onboarding checklists, and recurring plans.
Live conversation in any channel or DM
Start from the headphones icon, then use video, screen sharing, reactions, and notes when a text thread is getting too slow.
M
J
P
A
mic
cam
share
end
A built-in document next to the conversation
Use a canvas for project plans, meeting notes, SOPs, launch checklists, and links people should not have to hunt for.
Launch Plan
xGoals and decision log
xOwner checklist
Open risks and action items
Links to files, dashboards, and tickets
Daily rhythm
A calm Slack day in five moves.
You do not need to watch Slack constantly. Give yourself a repeatable loop: check direct signals, scan key channels, respond clearly, switch to live discussion when needed, and close loops.
1
Start with Activity
Handle DMs, mentions, and followed threads before browsing channels.
2
Scan key channels
Check your team, project, support, and announcement channels.
3
Reply with shape
Use context, ask, owner, and timing. Thread details.
4
Go live if stuck
When a thread keeps looping, start a short huddle.
5
Close the loop
Post the decision, mark Later items done, and update the canvas.
Shortcuts
Ten shortcuts that pay off quickly.
Slack has many shortcuts. Start with navigation, search, unread triage, message formatting, and huddles. Use the built-in shortcut list when you want the full set.
⌘/CtrlK
Jump to conversation
Move quickly to a channel or DM.
⌘/CtrlG
Start search
Find messages, files, and people.
⌘/CtrlF
Search current conversation
Search inside the channel or DM you are viewing.
Esc
Mark current conversation read
Clear unread state once you are caught up.
ShiftEsc
Mark all read
Use carefully when you are intentionally resetting.
⌘/CtrlShiftA
All unreads
Batch through unread messages.
Tor->
Reply in thread
When focused on a message, open or reply to its thread.
R
Add reaction
Acknowledge without adding another message.
⌘/CtrlShiftH
Huddle
Start, join, leave, or end a huddle.
⌘/Ctrl/
Shortcut list
Open Slack's full keyboard shortcut reference.
Team etiquette
Small habits that make Slack easier for everyone.
Slack works best when the team treats it as a shared information system, not just a chat stream.
+Do
1Use channels for work that others may need to discover later.
2Thread detailed replies under the original message.
3React with check, eyes, or plus-one to acknowledge without noise.
4Summarize decisions after long threads or huddles.
5Put durable plans, notes, and links in a canvas.
!Use care
1Do not overuse @channel, @here, or @everyone; they interrupt many people.
2Do not move project decisions into private DMs unless privacy is required.
3Do not start a new channel for every tiny topic; reuse clear existing spaces.
4Do not leave a huddle decision only in memory; write the outcome back to Slack.
5Do not assume "sent" means "seen"; mention owners when action is needed.
Sources
Official Slack Help pages used.
This guide paraphrases Slack basics and current terminology from Slack's Help Center, checked June 9, 2026.
Getting started for new Slack users
Profile, notification setup, and sending first messages.
How to use Slack: quick start guide
Sidebar, Activity, message field, and basic feature tour.
What is a channel?
Channel purpose and how Slack organizes work.
Use threads to organize discussions
Thread replies, thread notifications, and thread view.
Use mentions in Slack
How mentions notify people and when to use them.
Guide to Slack notifications
Desktop, mobile, email, badges, and default notification behavior.
Use huddles in Slack
Starting huddles, screen sharing, huddle links, and notes.
Use a canvas in Slack
Creating, sharing, editing, and using canvases as tabs.
Slack keyboard shortcuts
Navigation, search, unread handling, formatting, threads, and huddles.