AmiGO Manual: Slimmer
The Term Enrichment tool finds significant shared GO Terms or parents of those GO terms, used to describe the genes in the query/input set to help discover what those genes may have in common. The Term Enrichment tool makes use of the GO-TermFinder perl module written by Gavin Sherlock and Shuai Weng at Stanford University.
More information about this tool can be found here.