In the What If? post Yoda, the author writes:
Yoda’s greatest display of raw power in the original trilogy came when he lifted Luke’s X-Wing from the swamp.
What does raw power mean? I cannot find any useful example of this phrase in Google. I think it's similar to potential energy in physics context, but I'm not sure about that.
According to Macmillan Dictionary a raw emotion or quality is strong and natural, but not controlled or developed. So I think the same can be applied to power. However, Yoda is known to be a master, so his power cannot be uncontrolled or undeveloped, though I admit that I haven't watched the whole series.