An advertiser with stores throughout the country could use Location Extension Targeting to:

Q) An advertiser with stores throughout the country could use Location Extension Targeting to:
Ans:

Target users in the same way across all of their locations
Decrease bids by 50% for users who are within 10 miles of their stores
Target users who are within 20 miles of one particular city in the country
Target users who are within 10 miles of one particular city in the country