The document discusses how social relationships impact health and well-being, and how online social networks aim to foster social connections. It summarizes research that has found mixed results on the effects of social media use on loneliness, happiness, and depression. A Twitter survey found that people perceive online contacts as similar to themselves even if unknown, and receiving acknowledgement like replies or retweets boosts feelings of being recognized, connected, and appreciated. The power of perception is key, as people may feel companionship or support even without true reciprocity or understanding of others online.