Dreams are the stories our brains tell while we’re sleeping, they’re a collection of clips, images, feelings, and memories that involuntarily occur during the REM (rapid eye movement).
It’s hypothesized that everyone dreams, but a small subsection of the population reports that they never remember experiencing dream causing some researchers to wonder if certain people lack the capacity to dream at all.
While dreams are frequently interesting, and can allow us to act out certain scenarios that would never be possible in real life, they aren’t always positive but negative dreams, referred to as "nightmares," can create feelings of terror, anxiety, or utter despair.
It is said " As we age, the things that we desire from life become more complicated. Sometimes we want things that don’t feel right to us. For example, we may want our boss’s job. If she knew that, it could get us into trouble. So we hide that desire from both our boss and from ourselves".
Dreaming is a very complicated activity. According to Freud, the goal of a dream is to satisfy those desires that we can’t even voice, much less work toward satisfying, when awake.

The big question, however, is why we dream. Though it’s been discussed and studied for millennia, it remains one of the behavioral sciences' greatest unanswered questions. Researchers have offered many theories including memory consolidation, emotional regulation, and threat simulation.
Dreams typically involve elements from our waking lives, people we know, for instance, or familiar locations, but they often take on a fantastical feel.
Many people report that in their dreams, locations shift suddenly or blend with one another, and elements of the “characters” or “plot” often take on unreal, impossible, or contradictory characteristics.

The ancient Egyptians believed that dreams were communications from the gods, or prophecies of what was to come. Dream interpretation as a field of psychological study took off in 1899, when Sigmund Freud published The Interpretation of Dreams, laying the foundation for many of his theories of the unconscious mind.
Nightmares are often confused with night terrors, but they’re not the same: Night terrors is a type of disorder that causes sleeping people to scream, or demonstrate symptoms similar to a panic attack.
In ancient Egypt, people with vivid dreams were considered to be blessed with special insight, and many of their dreams have been found recorded on papyrus. In fact, the Egyptians believed that one of the best ways to receive divine revelation was through dreaming.