Facebook is one of the top social networking sites these days. The number of Facebook users is nearly two billion people around the world. They surf Facebook daily and spend countless hours online communicating with people. While communicating, most people try to modify their way of writing and commenting in accordance with the different sorts of people whom they are interacting with. Sometimes, users increase or decrease the social distance during interactions. The current study intends to investigate the adjustments and strategies that Facebook users make and follow while commenting in Mosuli social groups. The model adopted and by which data are analyzed is the Communication accommodation theory. The data are a corpus of (17899) words. The results of the study show that there are numerous purposes for converging and diverging. Moreover, divergence is very probable to happen since anonymity gives commenters freedom to express their ideas and to be offensive sometimes thanks to the absence of nonverbal feedback and unrevealing usernames.