Key on Reddit

What it signals here

upvote context

Comments containing genuinely useful advice often get 🔑 replies as shorthand for 'this is the answer'.

community use

Used in self-improvement, finance, and life advice subreddits to flag the most essential takeaway.

subreddit meaning

In r/LifeProTips and similar subs, it marks the core insight. In gaming subs, it refers to literal keys.

karma context

High-karma comments that solve a problem are often met with 🔑 from the community.

See it elsewhere