Use the Google+ Element to integrate various Google+ features with your Jimdo site.
You can add a Google+ Element directly from the Elements Menu after clicking Additional Elements:
Three options for your Google+ Element
The Google+ Element can take on three different forms: a +1 Button, a Share Button, or a Google+ Box. With each option, you can choose the size
and how the icon will appear. Here's a rundown of the choices:
When your visitors click a +1 Button on your site, they will show everyone in their Google+ circles that they like what they see, and that they recommend checking it out. Your page will be listed under that person's +1 list, and their friends will see in Google search results that they liked your page.
With the Google+ Share Button, your visitors can easily share a link to your webpage with everyone in their Google+ circles.
For another way to add a Google+ Share Button, check out the Share Button Element.
The Google+ Box provides a direct link to your Google+ business page or profile. From here, visitors can follow your page or add you to their circles.