Those interested in Lucid Dreaming or Conscious Dreaming, should look into Tibetan Dream Yoga rather than unverified sources which can be misleading.
For me, lucid dreaming is this:
"When you dream at night, your dream has a beginning, a middle, and an end. It seems real at the time, but when you wake up you know it is obviously a dream. Similarly, you can wake up in the dream of your life. You can wake up before the story of you ends, as all stories will eventually end. Waking up in the story is called "lucid dreaming" or "dreaming clearly." - Gangaji