Dreams, I believe, are messages floated up from the unconscious mind to get the conscious mind, i.e. the one that identifies themselves as “I” to focus on a particular issue of importance to the dreamer.
Most dreams are structured into narratives. Some dreams (dreams that tend to be associated with N3 NREM sleep) can lack narrative action and instead are just presentations of a visual scene or a single set of thoughts. Still, even these non-narrative dreams are not meaningless to the dreamer.
It is only the dreamer, however, that has the key(s) to deciphering what the dream symbols that appear actually means for them.