Lucid dreaming is being aware of the fact that you are dreaming. This awareness can range from very faint recognition of the fact (which is often too brief and nebulous to be considered truly lucid) to something as momentous as a broadening of awareness beyond what has ever been experienced even in waking life. What a dreamer does with lucidity reflects personal tendencies and levels of skill attained usually through experience and practice. Although a lucid dreamer can influence the dream's structure, characters, course, etc., it is not a given that a lucid dream is about what the dreamer wants it to be about. Seasoned lucid dreamers who are more often lucid than not will continue to encounter psychological and developmental challenges in the dreamscape. The agreeable and the distressing, the easy and difficult, beautiful and horrifying, are all occasioned much as they are in regular dreaming. But whereas a regular dream is filled with the convoluted subtleties of the subconscious mind enumerating its issues before a largely unconscious dreamer, a lucid dreamer has the opportunity to consciously explore at any level.
Lucid dreams usually occur while a person is in the middle of a regular dream and suddenly realizes that he or she is dreaming. The person is then said to be "lucid", and may enter one of many levels of lucidity. At the lowest level, the dreamer may be dimly aware that he or she is dreaming, but not think rationally enough to realize that events/people/actions in the dream are not real/pose no threat. At the highest level, the dreamer is fully aware that she or he is asleep, and can have complete control over his or her actions in the dream. However, with low mental control your decisions could be biased not by your opinion, but by your brain. You can control your dreams using the lucid dreaming methods that follow.