ON! Arrow on Facebook

What it signals here

reaction meaning

Used in comments to indicate agreement that something is currently active or relevant.

comment use

Posted under event announcements or live videos to say 'I'm in' or 'this is happening.'

boomer interpretation

Often misunderstood by older users as a literal directional or technical symbol, possibly confused with a TV remote icon.

group use

Community admins use it to announce that a group event or sale is currently active.

See it elsewhere