Often a Parent account will have franchise locations that are more easily managed by grouping them together, as their information matches.
To add a location grouping you will go to Business Setup > Business Profile > Location Grouping.
To add a new one, you will select Create Location Grouping in that section. You will create the name and mark which locations are associated to that title.
After saving that information, you will want to click Save on the Business Profile Page to finalize the update.
From there you will see this grouping on the Services Tab to allow you to edit the pricing for the whole group instead of individually by location.