What is a @here mention?

[JammyDodger]

Here’s the blurb from the announcement:

@jomaxro

@here support

Users can now mention @here to notify 10 people who replied to the topic. Admins can manage permission to use the @here mention, and the number of users mentioned, via the max_here_mentioned and min_trust_level_for_here_mention site settings.

I’m not 100% on what circumstance it’s useful for, but that’s what it does.