Seeking explanation of the difference between GO term normal vs non-redundant!

Question

[Soumajit]

Hi people,

I am trying to do some GO analysis (ORA and GSEA) of my RNA-seq data on the WebGestalt website and while choosing a functional database as geneontology, there are options for GO terms as normal and non-redundant (such as Cellular Component and Cellular Component nonRedundant).

Could any of you kindly explain what are the differences between these two and how it affects the result? I have tried both with my data and I see the enriched functions are somewhat different in the result.

Thanks in advance.