What is "Expense: Adjustment"?

[Gabriel A. Fouasnon]

Hello,

I'm new to this list. 

My version of GnuCash came pre-installed with a number of different accounts, and one of them was an expense account called "Adjustment." I don't really understand what purpose this account was intended to serve. Anybody know?

I searched the documentation and the archives, but was unable to find an explanation.

I'm running GnuCash 2.0.5 via X11 on Mac OS 10.4.11. 

Thanks,
Gabriel