You can use the compose button to write and send a message to any conversation. Messages automatically save as drafts in the Drafts section of your sidebar until you’re ready to send them.

In Slack, work comes together in dedicated spaces called channels. Channels bring the right people and information together for any project, topic, or team. Unlike email, discussions in channels are focused around specific topics, so you can join and leave them as needed.

Notifications in Slack are different from email or other tools you may be used to — they’re designed to make it clear where you’re needed by showing you a badge if a teammate mentions you. When there's new activity, conversation names appear bold in the sidebar.

Direct messages (DMs) allow for focused, one-off conversations that don't require an entire channel to weigh in. Use DMs for ad-hoc messages or tasks, like asking your manager a question, or coordinating a call with a teammate.

From the channel header, you can access details about the channel you're in. Click the channel name to see details like the channel topic and description, plus any added files. Use the other tabs to see who's in the channel and view other conversation settings.

Channels provide a dedicated space to write messages and add files. With everything related to a particular topic, project, or team in channels, you can scroll up to see the conversation history any time you open or join one.

Emoji reactions are a quick way to respond to any message in Slack. They're both fun and helpful for getting work done — a simple reaction can often replace the need for a follow-up message.

Add files to your messages to share important information alongside your team's discussions.

Use mentions to get the attention of specific people in a conversation, whether you need to ask for feedback or follow up on action items.

Format your messages to add a little clarity or pizzazz — bold the most important items, break out thoughts with bullet points, and more.

From the more actions menu, you can correct typos or mistakes after you send a message. You can also delete a message you’ve already sent if you need to start over.