Use blog posts as GMB promotions
Putting blog posts into a GMB is not simply repeating or duplicating the content, but rather repurposing it as a press release for GMB to easily find. A Google search with no clear direction can take ages for your content to be found. Simply posting blogs to your website will not give them sufficient spotlight. With GMB, they can be found right away. Take advantage of this by creating variations of your posts to leverage the increased exposure for more engagement.
Utilizing the algorithm with GMB will give you a better relationship with it; the more you change and update, the more GMB will interact with your content. Tag GMB with your geo-location so it knows exactly how to categorize your content, and this will improve your SEO. GMB is so essential now that all your external content such as blogs should link to it.