How to Use Slack: The Complete Beginner Guide

This is an independent guide. Not affiliated with or endorsed by Slack Technologies, LLC or Salesforce, Inc.

You just got a new job, and your team lives inside Slack. Or maybe your company switched from email, and now everyone expects you to know how channels, threads, and huddles work. Either way, you're staring at a sidebar full of unfamiliar names and wondering where to start.

This guide walks you through every part of Slack, step by step. By the end you'll know how to send messages, organize projects, hop on video calls, and use features most people don't discover for months. No prior experience required.

If you're still wondering what the platform actually is, start with our What is Slack explainer, then come back here for the hands-on walkthrough.

How to Use Slack Channels

Channels are the backbone of Slack. Every conversation belongs to a channel, and understanding them makes everything else click.

Creating a channel

Click the "+" button next to "Channels" in the sidebar, give it a name, add a description, and choose whether it's public or private. That's it. For a deeper walkthrough, see our guide on how to create a Slack channel.

Public vs. private channels

Public channels are visible to everyone in the workspace. Anyone can join, read the history, and participate. Private channels are invite-only, and their contents are hidden from people who aren't members. Use private channels for sensitive topics like HR discussions, salary planning, or confidential client work.

Joining and browsing channels

Press Cmd+K (Mac) or Ctrl+K (Windows/Linux) and type a channel name to jump there instantly. Or click "Browse channels" to scroll through everything that's available. Slack shows a preview of the channel description and member count so you can decide before joining.

Channel naming tips

Good naming conventions save your team from channel chaos. Common patterns include:

• #team-engineering, #team-marketing for department channels
• #proj-website-redesign, #proj-q2-launch for project channels
• #help-it, #help-hr for support requests
• #social-pets, #social-cooking for fun, non-work channels

Pick a pattern and stick with it. When every channel follows the same prefix system, people find what they need without asking.

Sara joined a 150-person company that had 200+ channels with no naming convention. Half were abandoned, and nobody could find anything. She proposed a simple prefix system to her manager, and within two weeks the team archived 60 dead channels and renamed the rest. Search results improved overnight.

How to Use Slack Messages and Threads

Messaging in Slack goes beyond typing and hitting Enter. Learning a few features early will make you a better communicator.

Sending messages

Click on any channel or DM, type your message in the compose box at the bottom, and press Enter to send. Press Shift+Enter to add a new line without sending. You can drag and drop files directly into the message box to share documents, images, or PDFs.

Formatting your messages

Slack supports basic formatting:

• Bold: wrap text in asterisks *like this*
• Italic: wrap text in underscores _like this_
• Strikethrough: wrap text in tildes ~like this~
• Code: wrap text in backticks for inline code
• Use triple backticks for multi-line code blocks
• Start a line with > for a block quote
• Use numbered or bulleted lists just like you would in a document

Using threads

Threads are one of Slack's most important features, and many beginners overlook them. When someone posts a message in a channel, hover over it and click "Reply in thread." Your reply stays attached to the original message instead of flooding the main channel.

This matters because busy channels can get noisy fast. If three people reply to a question directly in the channel, those replies push other conversations off screen. In a thread, the discussion is contained. People who want to follow it can; everyone else sees just the original message.

Mentions

Type @username to notify a specific person. Use @channel to notify everyone in the channel (use sparingly). Use @here to notify only people who are currently online. Misusing @channel in a 500-person channel at 11 PM is a fast way to make enemies.

Reactions

Hover over any message and click the smiley face icon to add an emoji reaction. Reactions are surprisingly useful. Teams use them for lightweight polling (thumbs up/down), acknowledgments ("I've seen this"), and reducing clutter ("Thanks!" as a reaction instead of a reply).

Pinning messages

Hover over an important message, click the three dots (...), and select "Pin to channel." Pinned messages stay accessible at the top of the channel details panel. Use pins for things like project briefs, onboarding links, or team agreements that people reference often.

How to Use Slack Huddles and Video

Sometimes typing isn't enough. Slack has built-in audio and video features so you don't need to switch to another app for a quick conversation.

Starting a huddle

Click the headphones icon in the bottom-left corner of any channel or DM. That's it. A huddle starts instantly with audio. No calendar invite, no meeting link, no waiting room. Other people in the channel see a small indicator and can join with one click.

On paid plans, you can turn on your camera during a huddle for video calls with up to 50 participants. Free plan huddles are one-to-one.

Jamie needed a quick answer from a designer about a layout decision. Instead of typing three paragraphs of context, she clicked the huddle icon in their DM, talked through the issue in 90 seconds, and both went back to work. That conversation would have taken 15 minutes over text.

Screen sharing

During a huddle, click the screen sharing button to show your screen to everyone in the call. You can share your entire screen or a specific window. This is useful for code reviews, design feedback, walking someone through a spreadsheet, or debugging together.

Clips for async video

Clips let you record short audio or video messages and post them in any channel or DM. Click the camera icon in the message compose box, record your clip, and send it. The recipient watches it on their own schedule.

Clips work well for:

• Explaining something visual (a bug, a design, a dashboard)
• Giving feedback that needs tone and nuance
• Sharing updates across time zones without scheduling a meeting
• Walkthroughs and quick tutorials

For more ways to handle video in remote teams, see our tips on Slack tips and tricks.

How to Use Slack for Project Management

Slack isn't a project management tool, but it works well as the communication layer that sits on top of one. Here's how teams set that up.

Channel-per-project approach

Create a dedicated channel for each project (e.g., #proj-mobile-app-v2). Pin the project brief, timeline, and key documents at the top. Everyone involved joins the channel and posts updates there. When the project ends, archive the channel. The history stays searchable.

Integrations with project tools

Slack connects with Jira, Asana, Trello, Linear, Monday.com, and dozens of other project management apps. These integrations send notifications to your project channel when tasks are created, updated, or completed. You can also create and assign tasks from Slack without leaving the conversation.

For example, connect the Jira integration and type /jira create to build a new ticket right from Slack. The ticket links back to the Slack conversation for context.

Workflow Builder for standups

Slack's Workflow Builder lets you create automated routines without writing code. A popular use case is async daily standups. Build a workflow that posts three questions every morning ("What did you work on yesterday? What are you working on today? Any blockers?"), collects responses from each team member, and posts a summary in the project channel.

This replaces a 15-minute meeting with a two-minute form that everyone fills out when it suits them.

Canvas for project docs

Every channel can have a Canvas, which is a lightweight document editor built into Slack. Teams use canvases for meeting notes, decision logs, project specs, and onboarding checklists. The canvas lives right next to the conversation, so there's no hunting through Google Drive links.

Luis runs a five-person product team spread across three time zones. He set up a #proj-search-redesign channel with a Jira integration for task tracking, a daily standup workflow, and a canvas with the project spec and design links. His team rarely needs synchronous meetings because everything stays visible and organized in one place. For more integration ideas, check our guide on remote team Slack integration.

How to Use Slack AI

Note: Slack AI is included in all paid plans (Pro, Business+, and Enterprise+).

Slack AI uses large language models to help you work faster without leaving the app. Here's what it can do.

Channel summaries

Open any channel and click the AI summary button (sparkle icon) at the top. Slack AI generates a summary of recent activity: key decisions, action items, and important updates. This is a lifesaver when you return from vacation and have 500 unread messages spread across 20 channels. Instead of reading everything, you skim the summaries and catch up in minutes.

Thread recaps

Long threads with 50+ replies are hard to follow. Click "Recap this thread" and Slack AI condenses the discussion into a short summary. You'll see the main points, areas of agreement, and any outstanding questions.

Search answers

Type a question in the Slack search bar and Slack AI provides a direct answer pulled from your workspace's conversation history. Instead of scanning through 30 search results, you get a concise answer with links to the source messages.

For example, type "What did we decide about the Q2 pricing change?" and Slack AI finds the relevant thread, extracts the decision, and cites the messages. It only searches content you already have access to, so it respects channel permissions.

Huddle recaps

After a huddle ends, Slack AI can generate a recap of what was discussed, including action items and key decisions. This is useful for people who couldn't attend the call or for creating a record of informal conversations.

Slack AI doesn't train on your data, and responses are only visible to the person who asked. It works within your existing security and compliance boundaries.

Slack Tips for Beginners

Once you're comfortable with the basics, these tips will help you work faster and stay sane.

Tame your notifications

Go to Preferences > Notifications and customize how Slack alerts you. Most experienced users turn off sound notifications entirely and rely on badge counts. You can mute specific channels that are active but not urgent (like #social-pets) and set "Notify me about" to "Direct messages, mentions & keywords" for a quieter experience.

Learn the essential keyboard shortcuts

• Cmd+K / Ctrl+K — Quick switcher. Jump to any channel, DM, or file instantly. This is the single most useful shortcut in Slack.
• Cmd+Shift+K / Ctrl+Shift+K — Open DMs
• Cmd+Shift+A / Ctrl+Shift+A — View all unread messages
• Cmd+[ / Ctrl+[ — Navigate back (like a browser)
• *Cmd+Shift+\ / Ctrl+Shift+* — Toggle the right sidebar
• Up arrow — Edit your last message

Set your status and availability

Click your profile picture and select "Update your status." Use it to tell teammates where you are: "In a meeting until 3 PM," "Lunch break," "Working from coffee shop." This reduces interruptions because people check your status before messaging.

Use Do Not Disturb

Set a DND schedule under Preferences > Notifications > Notification schedule. During DND hours, Slack suppresses all notifications. Teammates who send you urgent messages can choose to push through the DND wall, but casual pings won't bother you. This is critical for remote workers in different time zones.

Save items for later

Hover over any message and click the save icon (or press A when the message is focused) to save it. Saved items show up in your Later view in the sidebar. Use this for messages you need to respond to, links you want to read, or tasks you need to follow up on. It's your personal to-do list inside Slack.

Learn to use Slack search effectively

Slack's search supports filters. Type from:@sarah to find messages from a specific person, in:#proj-launch to search within a channel, or before:2026-01-01 to find older messages. Combining filters narrows results quickly: from:@sarah in:#engineering has:link finds all messages from Sarah in the engineering channel that contain a link.

For more power-user techniques, check our Slack tips and tricks guide.

Slack is a trademark of Slack Technologies, LLC, a Salesforce company. This site is not affiliated with, endorsed by, or sponsored by Slack Technologies, LLC or Salesforce, Inc.

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