Why do we remember some dreams, and why do we immediately forget others?

Dreams are thoughts and images, sounds, voices, and subjective feelings experienced when we are asleep. Each of us remembers a dream that touched him, be it beautiful or bad.

Dream of some future event, beautiful events you enjoy, but right before your <x0-finals, you fall asleep. Dreams of many details that you enjoy are called luxury dreams, for we are aware that we are dreaming, and even consciously, can affect subsequent events. In the REM phase, when eyes become fixed in sleep, dreams are longer and more beautiful.

But it can also be dreamed during the stage NREM (a phase in which our eyes do not move fast), we will just not remember those dreams. In short, the dream you remember right after the wake, but you seem unfinished, it's not the last one you've dreamed of. It's just the last one from the REM phase, which you remember, already seems to have ended only a second ago.