Google SEO 101: Updating Your Google My Business Listing – Search Engine Journal
Google My Business is only for businesses that serve customers at a physical location.
So businesses that strictly operate online cannot claim a Google My Business listing.
Service-area businesses are also eligible to claim a listing as long as they have a permanent location of some sort that is staffed during opening hours.
How is Google My Business Useful?
Google My Business helps people find your business through search results and Google Maps.
It can be used to maintain accurate information about a business in search and maps. It can also be used for engaging with customers and attracting new customers.