Do our dreams really tell us anything?

That's a great question and I think there are so many answers, answers that even we humans will never know. I do know that is there is something on my mind that I am really thinking about, I may have a dream about it. For example, I needed to pass a test and I dreamt I passed it. In real life, I did. Sometimes, I think our dreams are tell us things subconsciously. I think it is only speculation on what they really mean or why we dream at all.