To be more effective in any community you need to add value my friend.
All top bloggers are famous because they add and provide value to their readers.
Similar is the case with your Google + account as well. Keep providing value to your circle members.
Keep updating with the latest happenings in your niche and soon you will see good number of
followers.
Social Media is the game of patience and consistency …
I don’t know much about Google+, but I think it’s similar with Facebook becuase both of them are social network site. You should update information on Google+ by post link from your website.
You also should make a blog and let this blog connect with your Google+.
Made a brand page page for your website or product and update that page regularly. This will help you in getting more and more visitors and traffic also.
The quality content and information are the key to use Google+ successfully. The more you publish fresh and quality content on your G+ pages, the more followers you will get. It increase the seo value of G+.