Here's a great free Chrome plugin that I recently discovered that will help you with your Google My Business and your local search. The app is called G m B everywhere. All you have to do is go to the website, register for free and then install the Chrome plugin.
Once you're in Chrome, press that plugin and then open up Google Maps.
The first thing that you can do is do an audit on your current Google My Business listing by pressing the audit button. The next thing that you can do, and I really love this, is that you can look at your competitors Google My Business listings and see which categories they are listed for. As we know in Google Local Search, one of the biggest factors to make your Google My Business listing come up higher is the different categories that you can come up for.
Now with this plugin, you can see the categories that your competitor has put in their listing and that you can do as well for yours.
Finally, what this plugin allows you to do is that you can put in your U. R. L and the system will tell you different categories that they suggest might be relevant to you.
This is really a great plugin.
Let me know if it works for you.