Slack Mentions and At Signs

A mention is how you call someone's attention in Slack. You type the @ symbol followed by a name or special keyword, and Slack delivers a direct notification to that person or group. Used correctly, mentions cut through channel noise and ensure critical messages get seen.

Types of Mentions

MENTION TYPE     SYNTAX        WHO GETS NOTIFIED
──────────────   ───────────   ──────────────────────────────────
Personal         @alice        Alice only
Here             @here         Members currently active in channel
Channel          @channel      ALL members of the channel
Everyone         @everyone     ALL workspace members (#general only)

Personal Mentions: @username

Typing @alice (or the display name of any member) sends Alice a direct notification. The word appears highlighted in the message so it stands out visually. Alice sees a red badge on the channel and in her Activity feed.

Use personal mentions when a message is directed at one specific person — a question, a task assignment, or a request for review.

EXAMPLE:
  "@alice can you approve the design file by Thursday?"
  → Alice receives a notification immediately.
  → Other channel members see the message but get no special alert.

@here: Reach Active Members Only

The @here mention notifies only the people currently online and active in the channel. It skips members who are offline, in Do Not Disturb mode, or set to Away.

Use @here when you need a quick response from whoever is available right now. It is less disruptive than @channel because it respects people's offline time.

EXAMPLE:
  "@here quick question — is the staging server up?"
  → Only people active in #dev-team right now get notified.
  → Teammates in other time zones are not disturbed.

@channel: Notify Everyone in the Channel

The @channel mention sends a notification to every member of the channel regardless of their availability. People who are offline, sleeping, or in Do Not Disturb still receive this notification when they return.

Reserve @channel for genuinely important updates that all channel members must see.

USE @channel FOR:            AVOID @channel FOR:
───────────────────────      ───────────────────────────
Server is down               Casual questions
Critical deadline changed    "Anyone have a minute?"
Emergency policy update      Routine project updates
Team meeting cancelled        Links and resources

@everyone: Only in #general

The @everyone mention notifies every single member of the entire workspace. It only works in the #general channel. Use it only for true workspace-wide announcements — new company policy, emergency situations, or major organizational news. Overusing @everyone trains people to tune it out.

Mentioning a Channel

You can link to a channel in a message by typing #channel-name. The channel name becomes a clickable link. Clicking it opens that channel. Use this to point teammates toward a relevant discussion without copying content.

EXAMPLE:
  "Please post your questions in #help-it-support rather than here."
  → #help-it-support appears as a clickable blue link.

How Mentions Appear in the Interface

NOTIFICATION INDICATORS

  🔴 Red badge on channel name → you were mentioned
  🔵 Bold channel name         → new unread messages
  ● Dot next to channel        → activity (no direct mention)

  ACTIVITY FEED
  ↳ Shows all @mentions and reactions directed at you

Mention Etiquette

Mentioning people creates interruptions. Good Slack citizens follow a few unwritten rules:

• Tag only the person who can actually act on the message.
• Do not mention the same person multiple times in one message unless necessary.
• Check someone's status before mentioning them if the matter is not urgent.
• Never use @everyone or @channel for personal or low-priority messages.

Finding All Your Mentions

Click Activity in the left sidebar. All your @mentions, thread replies, and emoji reactions directed at you appear here in chronological order. This is your personal inbox inside Slack — the first place to check after returning from a break.

Key Takeaways

• @username sends a personal notification to one specific person.
• @here notifies only currently active channel members — kinder to offline teammates.
• @channel notifies all channel members regardless of availability — use sparingly.
• @everyone works only in #general and reaches every workspace member.
• The Activity feed in the sidebar shows all mentions directed at you.