I don't know that I have read anything according to Buddhism regarding dreams, so I can't give you a Buddhist perspective on it. For me, personally, dreams are just kind of a haphazard collection of thoughts in what we call subconscious, which often have relevance toward things we did during the day. Many of my dreams were just carried over from a different other things that happened in the daytime.
One thing about dreams, though, that can be significant is if you are very compassionate and lovingkind, you are not going to have many nightmares or if you do have any, they are actually very mild compared to what they used to be., It's very very real, it's happened to me, it's happened to Rosemary, it's happened to other people we know. Nightmares and bad dreams tend to dissolve, because we have an ability in our dreams at times to take control.
And this is a beauty of the practice, when you can actually see the practice filter into your dreams, it's really nice. So the more you develop then the more this will filter into your dreams in beneficial ways. For example, you are going to die, you expect you are going to die, for me, one time I was in a room and an airplane was coming and shooting, like in a war movie. I could see a rocket hit the building I was in. Realizing that I was going to die I sat down and starting to meditate, doing Compassion/Lovingkindness meditation for the world.
I didn't die, of course. I woke up and it was really, really nice. I was able to change my reaction in the dream. So when you start to see your purification, your actual peacefulness, your compassion, your love and everything going into your dreams, that's nice in itself.