MFA

What does "MFA" mean?

It means "made for adsense".

In other words there are sites out there that have adsense ads on them but hardly any content.

I have seen sites like this that have adsense ads on them but then they have just a line or two of content. Some MFA sites that I have seen have lines of links to other site but they still don't have much content.

Apparently Adsense is working hard to cancel the accounts (or sites) that have these kinds of layouts. Although a lot of people are still posting that they still see a lot of these sites around.