Google is introducing the ability to set up location extensions at the account level by linking your Google My Business account to your AdWords account. No longer will location extensions need to be set up separately for each campaign.
Formerly called Google Places for Business, Google My Business, is where businesses can manage location listings to display on Google Maps, Google Search and Google+.
Once you’ve added all of your locations to Google My Business and link to AdWords, you choose “upgraded” (i.e. account-level) location extensions from the Extensions tab to have them show automatically for all of your campaigns. You can set up filters to assign addresses to certain campaigns or ad groups.
The location listings can be used for targeting and bid adjustments.
Campaign-level (now called “not upgraded“) location extensions can be used until they’re phased out toward the end of this year.