On what order would you show things? Upvotes/downvotes? Could work but "social" media implies we all have different social circles, so my social circle of frien

On what order would you show things? Upvotes/downvotes? Could work but "social" media implies we all have different social circles, so my social circle of friends is very different from yours. I can probably see posts from my friends which you won't (since you're not friends with them) Maybe I follow certain pages that you don't. How do we still have the same feed then?