Verify your business with Google so it can appear to customers on Google Search and Maps. Most local businesses verify by postcard. Some businesses have other verification options, like verification via email, phone, or Search Console.
You must verify your business listing to manage your business information on Google Maps, Search, and other Google properties. The verification process helps ensure that your business information is accurate and that only you, the business owner or manager, has access to it.
Google Post Card, makes you verified as Google Local Business.