What is lucid dreaming? Please tell me, I want to know.

It is when you are able to control your dreams. For example, if you are having a dream that takes place in the desert, then you could change it to a castle in England. I can't lucid dream, but I wish I could...

I means being able to control your dreaming and what happens

It means dreaming :3

where your dreaming, but you know it's a dream