A swinging censer sends prayer upward as smoke. Dream books read it as purification of a space or a mood, and as words or wishes that rise beyond what can be said aloud.
When this appeared in your dream, what were you feeling?
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.