People vary greatly in how much they remember of their dreams. Perhaps most important reason why people forget their dreams is that they don't care. Western culture does not regard dreams as especially important, rather it regards getting out of the bed in time as survival factor. This is bad in two respects as most dreams occur at the end of the sleeping cycle and are often interrupted, and the necessity of getting up fast and keeping up with the schedule occupies peoples' minds and prevents them from thinking about their dreams in the morning.
Most dreams occur in REM sleep.
Rapid Eye Movements. Dreams last typically in the range of 5 to 45 minutes. Dreams seem to be a way for the subconscious mind to sort out and process all the input and problems that are encountered in waking life. Dreams can also improve your emotional well-being, reduce stress, improve your creativity, and provide a playground for your mind while your body recovers and repairs itself. Dreams can help us diagnose health problems, encourage us in the decisions we make, or reprimand us for negative behavior in our relationships.