Round symbols that appear next to your messages in the Messenger application on your mobile device show the delivery status of each of your messages. In addition, both the mobile Messenger app and the desktop version of the Facebook website support two other types of symbols that you or your contacts can add to messages: emoticons and stickers.
Delivery Status Symbols
Facebook displays a status icon next to your messages on your mobile device. There are four types of status delivery icons:
- An empty pale blue circle indicates that Facebook is currently sending your message.
- A pale blue circle containing a blue check mark shows that Facebook sent your message to the recipient's inbox.
- A filled blue circle containing a white check mark indicates that Facebook successfully delivered the message to the recipient's device.
- A circle containing the recipient's profile picture shows that your contact clicked or tapped the message to read it.
Emoticons are small, static icons that you or your contacts can add to messages to convey emotions or depict actions or items.
Like emoticons, you can add stickers to messages to portray emotions or actions. Stickers are, however, larger than regular emoticons and can be either static or animated.