GMB is an acronym that stands for Google My Business, which is the platform through which businesses can create their online presence on Google. While there may not be many direct synonyms for GMB, you could use related terms like "local SEO listing," "digital storefront" or "Google Maps listing." The benefits of using GMB - or any of its synonyms - include increased online visibility, the ability to manage and respond to customer reviews, and access to analytics data to help make informed business decisions. Whether you refer to it as GMB or something else, having a Google presence should be an integral part of any business's digital marketing strategy.