There are three fundamental psychological questions regarding dreams:
Dream Formation
Where do our dreams come from?
Dream Function
What purpose - if any - do they serve?
Dream Interpretation
What meaning - if any - do they have?
Different schools of psychology have different aswers to these questions. To further complicate matters the first two questions overlap with the physical neurosciences whilst the latter two questions are of great interest to philosophers. Attempting a synergy of neuroscience, psychoanalysis and philosophy is a major task.
Any school of psychology or analysis must of necessity consider the question of dreams, however some treat them as more significant than others - for example many mainstream academics do not accept that dreams have any coherent meaning.
So, in short it prob means feck-all