Mentions
Ping a person, role, or channel, or show a custom emoji, with a token built from its id.
A mention is an id inside angle brackets. Discord swaps the id for a name and makes the result a link. Use a mention when the person or channel needs a notification or a jump; use plain text when you only want the name.
Users
Put @ and the user’s numeric id between angle brackets. Use the id, not the username.
<@378293909610037252>A user mention notifies the person, subject to their notification settings, and the id stays valid when the username changes. A user mention can sit inside a sentence like any other word. The chip shows the name the reader knows, which can differ between servers.
Roles and channels
A role uses @& instead of @. The ampersand is what separates a role from a user, so keep it in place. A role mention notifies the members who have that role, if the role allows mentions.
<@&378293909610037252>A channel uses # and the channel’s id. A channel mention creates a link that jumps to the channel; it does not notify the channel.
<#378293909610037252>Custom emoji
A custom emoji uses a colon, its name, another colon, and its id. The name is a label; the id selects the image. The emoji renders at text size in the message.
<:duck:1263836954789806154>A custom emoji belongs to the server that owns it. A reader who cannot use that emoji may see the name instead of the image, even though the token is valid.
Everyone and here
@everyone and @here are plain text, with no brackets or id. @everyone reaches everyone who can see the channel; @here reaches the members who are online. Both are loud, so use them for announcements rather than routine replies. You need permission to mention everyone in a server.
Finding an id
Turn on Developer Mode under User Settings, then Advanced. Right-click a user, role, or channel and choose Copy ID. On mobile, long-press the item instead of right-clicking. The id is a long number; paste it between the brackets exactly as copied.
Watch out
<@name> is not a mention. The token takes a numeric id, so a username between the brackets stays as plain text. The same applies to <@&name> and <#name>: roles and channels need their ids too. If a mention shows as raw brackets, check for a name where the number should be.