Waving Hand on Reddit

What it signals here

upvote context

Used in post titles to introduce oneself in AMAs or community introductions, boosting engagement.

community use

Appears in r/introductions and subreddit 'new member' threads as a standard greeting device.

subreddit meaning

In niche subreddits it can signal ironic departure from a thread after being proven wrong.

karma context

Low-karma accounts use 👋 posts to introduce themselves and farm initial upvotes from welcoming communities.

See it elsewhere