What are dreams

Dreams are the result of mental activities occurring during certain phases of sleep. The experience of dreaming is usually that of a series of visualized events occurring in a manner that often defies logic. 

Sleep laboratory experiments have shown that all of us dream every night. but most of our dreams are immediately forgotten on waking, but it is possi­ble to increase the amount of the dream content remembered by making routine written or phone-recorded notes immedi­ately on waking.