Learners majoring in English who use Facebook are provided opportunities to do many things on Facebook, such as improving their own grammar, sentence structure, content, organization of writing, and vocabulary.Then, a sample activity is presented so that learners get concrete ideas about how to improve their written communication through Facebook.It is necessary that teachers create a variety of writing activities in Facebook group to help his learners to develop their writing skills.Here the learners get more opportunities to formulate their own ideas or feeling about the issues as well as to improve their writing skills.