The send button looks more similar to the like button. When clicked, it pop ups a new box which allows you to enter your facebook friends name with your message and the blog content. You can only use the send button when you are logged in to your Facebook account, similar to the Like button
Moreover the number of sends will count towards the total number of Likes a page has. That means the total number of Likes will now be calculated by adding the number of Likes, shares, comments and inbox messages. You can get the send button for your website from the facebook developers page.
Do share your views about the new Facebook “Send” button!