A Google Business Profile setup is free. Google's sign-up guide says customers can find the profile only after verification. Sign in to a Google Account, open the create screen, enter the business name, and search for a category. Say whether customers can visit a location that is staffed during business hours. A storefront adds an address or a map marker. A business without that storefront chooses no, then enters up to 20 service areas by city, postal code, or other area. Google's tip on that page is not to stretch the whole area past two hours' driving time from the business base. Add a phone number and a website, finish, and choose verify now or verify later.
If the profile does not exist, Google's add-or-claim guide says to open business.google.com/add, choose Add your business to Google, follow the screens, and pick a verification option. Adding or claiming costs nothing. If an unverified profile is already on Maps, search the business name and city, then choose Claim this business and Manage now. If another person has verified it, request ownership instead of making a second profile.
Google's verification guide says the methods are chosen by Google and cannot be changed. When they are offered, that page describes phone or text, email, a live video call, and a postcard. It also says that if a business is eligible for video verification, Google recommends that option. Which methods appear depends on the business, its public information, region, and hours. A postcard, when offered, usually arrives within 14 days, and the code expires after 30 days. Do not change the name, address, or category while that code is in the mail, and do not share the code. Google says the review after you submit can take up to five business days. A service business should keep one profile for the metropolitan area it serves and hide an address customers do not visit.