It's being awake as the main character in your dream. It's being aware in that other world of bizzar images. And if u train u can do more. The limit is your mnab. Awo I was lucid a lot of times. I use an easy technique. I sleep at 5pm and wakeup at 10 and stay wake for 30 mins to an hour then go back to sleep and I'm having lucid dreams repeatitively.