A google+ provides an identity to your services, brands, products etc. It is a good platform to promote your site
Google + is the program launched by Google to upload the business information page of an individual user.This program has become successful among google's users.
Google page is an extension of Google. It is a social media platform where you can promote your website
Google+ pages provides Bussiness, products,brands, and organizations with a public identity and presence on Google+. Pages can currently be created for one of five categories to help guide you when signing up.