Publisher overrides can be added for a business location at 3 stages.
Navigate to the Add location CTA button to open the window to add a new location.
Add all the location attributes for your location. To know more about adding location attributes, refer to this article.
Scroll further down and you will notice a new section added for publisher overrides. Here click on +Add publisher overrides.
In the following window that opens up, choose the publisher for which you want to add the overrides from the drop-down menu.
If you select Google, you can add up to 5 overrides.
If you select Facebook, you can add up to 3 overrides(Facebook allows a max for 3 categories).
Select the attributes that you want to override and hit save.
Once you have added the publisher overrides attributes, hit the add location option to add the new location with the publisher overrides.
Note: It will take up to 48 hours for this information to be published on the selected sites.
From the location manager page, select the location for which you want to add publisher overrides.
Then click on edit this location.
This will open the edit location page, where you can scroll down to the publisher overrides section and add the attributes as mentioned above.