How does Reddit's algorithm prioritize different types of user interactions (e.g., comments, upvotes, saves) when ranking content in a user's feed?

Reddit's algorithm prioritizes content in a user's feed based on a weighted combination of factors, where upvotes, comments, and saves contribute differently to the ranking, along with factors such as recency and personalization. Upvotes are a primary signal of positive community sentiment and contribute significantly to a post's overall score, influencing its visibility. The algorithm also accounts for the age of the upvotes, giving more weight to recent upvotes. Comments are a strong indicator of engagement and active discussion. A post with a high number of comments signals that it is generating interest and participation, which the algorithm values. Saves indicate that users find the content valuable and want to revisit it later. Saves are given significant weight because they represent a deliberate act of engagement and long-term interest. The algorithm also considers the user's past interactions and subreddit subscriptions. Content from subreddits the user is subscribed to and content that aligns with their past engagement patterns is prioritized. The relative weighting of these signals is not publicly disclosed and is subject to change, but the general principle is to surface content that is timely, relevant, and engaging to each individual user. Content from sources that a user interacts with more frequently, such as certain subreddits or individual posters, may also be weighted more highly than content from unfamiliar sources. Therefore, the algorithm uses these actions to rank content.