Footprints are traces of someone’s passage, so dream books read them as the influence of others, or the path you have already walked. Following them stands for being guided; seeing them washed away, for things that pass.
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.