Facebook friends with a green dot next to their names are online and available to chat, and friends with a phone symbol next to their names have Facebook apps installed on their mobile devices. When neither symbol is present, the friend is not available to chat online and does not have a Facebook mobile app.
In addition to these symbols, a selection of symbols within Facebook or its chat app makes communication simpler. Numerous emoticons, or smilies, add character to messages and help users communicate more effectively. Virtual stickers are also available, which can be transmitted between one friend and another on the Facebook site or via one of its messaging apps.