Quick meaning
Tagging someone in a post or comment using the @ symbol so they receive a notification.
Think of it like this
Like calling someone's name in a crowded room to get their attention.
Where you may see this
You may see this on Facebook, Instagram, TikTok, WhatsApp groups, and other social apps.
Why it matters
Understanding the term helps you use social platforms more comfortably and spot risky or misleading behaviour.
Say it simply
Mention (@) means: Tagging someone in a post or comment using the @ symbol so they receive a notification.