Facebook uses an algorithm to determine the top six friends that appear on a user's profile page based on how often they interact with each other. The algorithm considers a variety of factors, including: Interactions: How often a user interacts with a friend, such as by liking and commenting on their posts, sending messages, and tagging them in photos Mutual friends: Whether the user shares mutual friends with the other person Recent activity: How recently the other person has been active on Fac