The Google +1 button is widely seen as Google’s answer to the popular Like button of Facebook as they share similar goals – you can recommend web pages to your social circles with a click. This 1-sheet overview explains the +1 concept in greater detail.
Google +1 Bookmarklet
Most websites and blogs have added the Google +1 button but if you like to recommend a web page on Google Plus that doesn’t have the +1 button, you may use the following bookmarklet – just drag the link to your bookmarks toolbar (video demo) and you will be able to +1 any web page on the Internet.
Share on Google Plus Bookmarklet
The Google +1 bookmarklet, discussed above, helps you +1 web pages that would then show up in your Google Plus profile under the +1′s tab.
However, if you would like to share a web page, video or picture among your circles on Google Plus, you need to install the Share on Google+ bookmarklet.
The Share on Google+ bookmarklet, when clicked, opens a little overlay window and you can share the current page in your Google Plus circles without leaving the existing page.