's first 10 years, we stepped outside our comfort zone. It was the first time many of us paired our online identities with our real names. We -- perhaps without even realizing it -- became more comfortable sharing more: our photos, our thoughts, our locations. That's exactly what Mark Zuckerberg wanted.
But as Facebook flourished, privacy grew complicated. The social network added settings. It removed settings. It launched features that collected user data. While Facebook set out to blaze a trail of openness, it left users pining for more privacy.
Finally, after 10 years of surrendering to Facebook privacy change after privacy change, the inevitable happened: We became less open, less social.
According to a survey by the Pew Research Center, only 10% of users update Facebook status on a daily basis. One quarter report they never do. Sharing and openness have been the lifeblood of Facebook, but that's changed. During the next 10 years, Facebook faces three big challenges -- but can address them.