In a locuszoom file, what does a column title "pp" contain?

Question

[LauferVA]

The following output is reprinted from http://genome.sph.umich.edu/wiki/LocusZoom_Standalone#Fine-mapping_credible_sets

I am just hoping to learn what the meaning of the 4th column is. Thank you.

snp     chr    pos          pp       group     color
rs1     18     55931115     0.88     AMR       red
rs1     18     55920115     0.88     AMR       red
rs1     18     55940115     0.88     AMR       red
rs1     18     55930115     0.88     EUR       blue
rs2     18     55940115     0.02     EUR       blue
rs3     18     56000000     0.03     AFR       green
rs4     18     56022000     0.03     AFR       green
rs3     18     56100000     0.03     ASN       purple
rs3     18     56150000     0.03     ASN       purple
rs4     18     56160000     0.03     ASN       purple
rs4     18     56180000     0.03     ASN       purple

Answer 1

[Pierre Lindenbaum]

population: AMERICAN, EUROPEAN, AFRICAN, ASIAN...

Answer 2

[DM]

I guess "pp" refers to posterior probabilities.