Once you have created a Google Plus page for your business, you should link it to your business website.
Linking your Google Plus page will verify your page with Google, and help your page and your website place better in search results. Verifying your page also lets you place a badge on your website that will encourage users to add your page to their circles.
A Google Plus “badge” is not the same as a button. A button will simply take the user to your page, a badge allows the user to add your Google Plus page to their circles on the spot, without needing to navigate away from your website. But, you cannot take advantage of this functionality without first verifying your your Google plus page by linking it to your website.
The video above demonstrates how you can link your Google Plus page and your business website.