Hmm... what does 'bottom line' mean?

Notice this term in Overture affiliate partnership page...

[irock]

I was wondering if anyone could tell me what 'bottom line' means in here. I would like to submit a proposal to Overture for listing their CPC ads on our sites.

"Strategic Partnerships
Overture is extremely effective at providing Web publishers with content that generates high CPMs. If you have a technology or business model that would enhance Overture's proposition to Web publishers, or are a large Web publisher that would like to identify how Overture can help you enhance your bottom line, please contact our Strategic Partnership team."

Thanks!

[Mardi_Gras]

Bottom line - the last figure on your profit/loss statement after everything is added in. "Enhancing your bottom line" is a reference to making your business more profitable.