What Are Atahualpa Page Options/how to remove

Hey All,

I noticed when I was creating a page that further down the page there are Atahualpa Page Options and under this one can fill in the following:

Body single pages
Body title multi post pages
Meta title
Meta keywords
Meta description

Can someone give me a brief description of what one would put for these and what the purpose of these options are?

Thanks,

Gradlebum