The aforesaid limitations motivate our study on social network user influence and dynamics prediction in this paper. In particular, to address the first limitation, we take an initial step to introduce three dimensions of influence: (i). Monomorphism vs. Polymorphism; (ii). High Latency vs. Low Latency; and (iii). Information Inventor vs. Information Spreader, for understanding the characteristics of influential users calculated from various methods. These three dimensions provide an evaluation framework to systematically measure the influence.