A Reddit post's position in a feed is determined by…

A Reddit post's position in a feed is primarily determined by voting. The upvote and downvote system directly influences a post's visibility and ranking. Posts with more net upvotes rise higher in feeds like "Hot" or "Top," making them more prominent. While the number of engagements (comments, shares) can indirectly contribute to a post's popularity and thus its voting, voting is the direct mechanism for feed placement. Time (chronological) is a factor in the "New" feed, but not the primary driver for general feed visibility. "Most recently commented" is not a standard feed sorting option.