In an attempt to make Facebook ads more transparent it is now going to start showing the locations of ads.  This is an addition to the “about this account” feature where you can learn more about the advertiser that is posting an ad.  

This is a particularly important feature that will be useful for political ads.  You will be able to see the originating location for the page promoting a political ad.

This is being trailing in the US on Facebook and will be rolled out worldwide and across Facebook initially then to the rest of users and facebook owned properties like Instagram in time.