What many people have been expecting as an obvious feature when Google+ was launched is now becoming reality. It’s not fully rolled out yet to everyone (just tried on a page but didn’t get the magic) but you will be able to share the page you are +1’ing on your Google+ circles.

When it’s live: Just +1 a page as usual and look for the new “Share on Google+” option. From there you can comment, choose a circle and share. It’s very similar to the Facebook Recommend button, but it’s all about bringing fresh content to your Circles not your Newsfeed.
When you share content from the +1 button, you’ll notice that Google automatically includes a link, an image and a description in the sharebox. Google is calling these “+snippets,” and they’re very similar to “comments” in Facebook’s Recommend feature

Full article: You can now share content into Google+ circles with the +1 button – TNW Google.