● Gathering user upvotes data.● Personalized ranking for every user based on his activity, knowing what type of reviews and what type of literature he/she likes. For users who don't upvote reviews, we may use recommendation / collaborative filtering technique and show similar users personalized ranking of reviews.● Personalized ranking would be further extension for relevance ranking where we use upvotes per user and learn which type of reviews a person likes and based on that helpful upvote we will show the reviews on top which have same features and relevance which the person upvotes.