An irrelevant person who wants to be relevant so they share so called dreams and claim they're revelations from God about the future. One of the things they all have in common is that none of their dreams actually come to pass.
Some examples of LDS dreamers are-
Sara Mennett
Julie Rowe
Hector Sosa
Gayle Smith
AVOW site folks (another voice of warning)
and there are plenty of dreamers who post on this site too, but not so much lately. Mostly just a bunch of believers of false dreamers.