Google+ Page Badge Code
Tips using Google+ Badge Button Codes:
1. Connect your website to your Google+ Page
<link href="https://plus.google.com/PAGE_ID/" rel="publisher" />
The PAGE_ID is the long number from the URL of your Google+ page.
This has the added benefit that the page may qualify for Direct Connect and people can visit the page by typing +PAGE_NAME in Google's search box. "In addition to helping us better index your Google+ page, this snippet will help you show more personal recommendations around the web by linking your +1's on sites, your Google+ page, search and display ads," mentions Google.
2. Place this tag where you want the badge to render:
3. Go to: https://developers.google.com/+/plugins/badge/config