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Mentions (often known as @mentions) are a useful way of drawing someone's attention to a page or comment, or assigning a task to them.
When you mention a user, they'll receive a notification by email and in their workbox; if you mention them in a task, the task is assigned to them and appears in their tasks list.

Only licensed users are able to use mentions.  

Mentions in Jira

If you want to inform someone about an issue, but don’t feel like they need ongoing notifications, @mentions are a perfect solution.
You could also reassign a ticket to a colleague for consultation, but that’s a fairly heavyweight operation to just ask a question.
By using @mentions, you can quickly direct conversation in comments to get needed feedback and keep you moving forward.
That way the issue always stays assigned to you and on your radar.

The following users can being mentioned in Jira:

• Reporter
• Commenter 
• AsigneeYMEUACJiraServiceDeskUsers 
• Jira Service Management agents

Participants of a ticket which are only Jira Servicedesk portal customers cannot being mentioned, unless they have left a comment in the ticket, then they will  become a commenter on the ticket.

Jira dashboard filter

Following filter can being used in your dashboard to display all unresolved tickets of the last 7 days where you have being mentioned in.

• All Issues I’m mentioned in 

Mentions in Confluence

Licensed Users in Conluence Confluence can being mentioned when they are having read/write or write authorization.Users need to be part of a group to have  write access in Confluence 
Do not use a mention on a Confluence page for creation of documents because expired, removed or inactive users do not remain visible. So always mention full names.
Following group is only having read access and cannot being mentioned in a page.

• YMEUACConfluenceViewerUsersPublic (Members of this group are Jira customer portal users)

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There are two ways to mention someone in Confluence: using autocomplete, or via the Insert menu in the editor toolbar.

Below  Below both mention ways are explained:

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If you'd rather use the Insert menu, choose Insert > User Mention then search for and select the user you want to mention.

Notes

• Link to a user profile – You can use a square bracket '[' and a person's name to trigger Confluence autocomplete and link to a person's user profile or personal space. Confluence will send the person a notification just as if you had used @mention (unless the administrator has disabled the user mention feature).
• Mention notifications - A notification is sent to a person the first time you mention them in the content of a page, but not for subsequent mentions. If you need to catch someone's attention, and you've already mentioned them on the page, try mentioning them in a comment. A notification is sent every time you mention someone in a page comment or inline comment, not just the first time.
• Frequently mentioned people - Confluence relies on your browser's local storage to remember the people you mention regularly. You may see different results if you switch devices, or don't allow local storage.  Confluence doesn't indicate whether someone is a creator, contributor or commenter when they are also a recent mention (because we're grabbing them straight from your local storage, not the page itself). 
• Changing the mention name - if you change the mention name in the editor (for example you backspace to remove their surname, or edit the mention link to change their full name to their preferred name) this will be treated as free text and won't be updated if the person changes their name, or is deleted from Confluence. 

Notes for the administrator

• Disable mentions – The functionality is provided by a plugin called the 'Confluence Mentions Plugin'. If you need to remove the user mention functionality from your site, you can disable the plugin. See Disabling or Enabling a Plugin, this can only be done by the administrator. 
• Mentioning groups – You can only mention individual users who have the 'Can Use' Confluence global permission. There's a feature request to allow mentions for groups: Image RemovedCONFSERVER-23015 - Extend 'Mentions' to work with groups as well FUTURE CONSIDERATION

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Related articles

For more information about mentions see  https://confluence.atlassian.com/doc/mentions-251725350.html

Related articles

Sources

https://confluence.atlassian.com/doc/mentions-251725350.html

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