Global Databases can assist in keeping your information uniform across all of your locations. Managing services from the Parent Dashboard is one way to help with this uniformity.
If the local shops are not able to edit their pricing themselves, and pricing varies by location, you will want to enter that for them. To prevent manually entering, editing and saving prices on the location dashboard, you can manage this through your Parent Dashboard.
To get to your Global Services you will go to Business Setup > Services. At the top of the page will be a drop-down that will include your locations
To update the pricing you will want to select a location. This will generate their services and current pricing.
You will then proceed to edit the pricing and save your changes.