Google My Business no longer automatically creates a Google+ page for your business when you create a Google My Business listing. You have to Enable this separately.
Update: 31st October 2017
Google My Business has confirmed that enabling a G+ business page will no longer be available. Users will need to now create a G+ Brand page for their business on G+.
How to Create or Enable a Google+ Business Page
- Log into your Google My Business account
- Go to My Accounts dashboard
- Select the business you want to enable a G+ page for
- Google+ page is now created and connected to the Google My Business listing.
- Fill in the business profile.
Step by Step
Enable Google+ Page for Business
Log into your Google My Business account.
Go to My Accounts dashboard.
Selecting the new account brings up an empty Google+ page with some featured pages and trending posts. The user needs to select Enable G+.
Select >> Edit Profile, this opens the About section. Add a Tag line and Introduction to your business. If you had not added a logo and header image previously, this can also be added.
Complete your business pages profile.
The G+ icon is now enabled in your Google Business Page dashboard and you can navigate from the Google My Business dashboard.
If you are going to create a Google+ business page, then I would recommend keeping it active. There is nothing worse then an empty social media channel for a business. Googlebot also reads, understands, indexes and caches your posts on the Google+ page if they are posted to public.