Warning: Undefined array key "visitor_referer_type" in /var/www/vhosts/wordinf.com/core/app/libraries/Core.php on line 98 Mark Zuckerberg - Understanding who you serve is...
Understanding who you serve is always a very important problem, and it only gets harder the more people that you serve. We try to pay a lot of attention to this by a combination of very rigorous quantitative and qualitative feedback. But if you're serving 1.2 billion people, it's very hard.