Advanced moves?

So me and quite a few of my friends have been playing regular MotW matches, but I have always been wondering what "mark two of the basic hunter moves as advanced" means under the advanced improvement section.

Its probably a stupid question due to lack of coffee, but can someone explain it?

By default, all basic moves have an effect when you roll a 7-9, and a better effect when you roll a 10+. 

Once you mark a basic move as "advanced", a new option for that moves becomes available.  However, the "advanced" effect only kicks in if you roll a 12+ when rolling for that move. 

That's it.

The new 12+ results for each basic move are on page 122 of the revised edition.