The document discusses how social media profiles can serve as archives that facilitate ordering and telling narratives of identity work and development over time. It notes that Facebook's timeline feature enables reflection on this identity work. Critical life moments like a family death can be visible amid more mundane posts and influence a user's transition away from one platform to another where more friends and family are located. The document also raises implications for using social media data longitudinally in research and ethics of connecting with participants on these sites.