How to Add a CTA button to GMB Post?

1. Make sure that you have selected the Google My Business social channel from the Publishing window that appears when you click on the New Post button.
2. Click the G+ icon from your compose screen and select a CTA button from the pop-up that appears: Sign Up, Learn More, Order Online, Book, or Buy.
3. Enter the link to a website and click Add and Published or Schedule post to Storefries.