Google now adds a Share button to share webpages to its social media platform Google+. This Share button also works as the way Google +1 button does but with more control. By giving +1 to a webpage you simply recommend that page
Post Revisions are automatically created revision content for your posts. Whenever you save a post or a page, the old version is retained so you can revert back at any time. Older revisions are never deleted so you always have a full history of all page changes. Automatic posts saving feature will be helpful when your post deleted accidently.