The courier is read as urgency and something that must reach its place in time. Dream books see the figure as a message, task or feeling that needs delivering.
Where in your waking life have you met something like this lately?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.