Skewness and centralmoment

I have distribution which I want to calculate the third order moment function of my distribution. I got confused what is different between Moment third order and skewness and which one are correct for my purpose.

this is what I am writing?

data1 = RandomVariate[NormalDistribution[2, 2.5]]; data2 = RandomVariate[NormalDistribution[1, 0.5],]; i = Abs[Moment[data1, 3]]; i1 = Abs[Moment[data2, 3]]; 

or I can

Skewness[RandomVariate[NormalDistribution[2.5, 2.5]]]?