On Reddit, users can ____ a post when they feel something contributes to the conversation or ____ a post when it's irrelevant to the community.

On Reddit, users use "upvote" to signal that a post contributes positively to the conversation or community, and "downvote" to indicate that a post is irrelevant, unhelpful, or goes against community guidelines. This system, known as "karma," influences a post's visibility and a user's reputation. "Like" and "dislike" are terms more commonly associated with other social media platforms. "Plus one" is an outdated term from Google+.