The interpretation of dreams is an ancient art. In early cultures, dreams were usually associated with revelations by god(s), and their interpretations were usually revealed by some kind of oracle or soothsayer. In fact, many kings used to have their dreams interpreted, in hopes of finding advice and knowledge.
In modern times, that kind of dream interpretation is still present, but not as prevalent: with the advancement of science, especially the empirical advancement of psychology, dreams can be analyzed and explained. Some consider interpreting dreams for anything other than their face value to be naive or foolish.
Still, dream interpretation is not necessarily incorrect. As stated above, issues we deal with daily can easily influece what we dream. That way, the content of our dreams can be analysed, in order to find possible problems that have been occupying our thoughts, changing our beliefs, increasing our fears fears, and many more.