Google My Business Guide
Your Address in Your GMB
Physical Location Businesses – If customers can visit your store/office then you may publish your address.
Current recommended practice for suite numbers is to place it on the second address line and enter it like #300. Google completely ignores suite numbers. They do not factor suites into consistency in any way, no matter where you put them. But, they are important for getting your customers to your store/office in the least hassle free way. So adding the suite number is for customer experience.
Service Area Businesses
If customers do not come to you then you will need to set a service area based on the regions, cities, Zip/Postal Codes, or districts that your business serves. You no longer can set a radius around your business. For businesses with an existing GMB listing, you are going to have to login and update your information.
Go to their maps listing,
Right-click and view source,
Ctrl-F for and search for the primary category (enter the category name that is listed on their GMB listing).
When updating your business information, you have the option of entering your, service area, or both.
(1) If you don’t serve customers at your business address, leave the address field blank and only enter your service area.
(2) If you serve customers at your business address but also have a service area, enter both your address and service area.
Recently, Google launched a maximum of 20 service areas per business listing. For businesses that are using more than 20 areas, an email should have been sent indicating you’ll need to update the listing, and included in the email a suggestion for how to cover the same geographic area using only 20 regions.