Up-left Arrow on Reddit

What it signals here

upvote context

Used in comment threads to point at a highly upvoted comment above, amplifying its visibility or agreement.

community use

In subreddit discussions, used to silently highlight a previous comment that made an excellent or damning point.

subreddit meaning

On r/memes and r/facepalm, it appears frequently in image macros pointing at something absurd in the upper-left.

karma context

Karma farmers use it with 'this' to point at a popular comment, riding its engagement wave.

See it elsewhere