As you may have noticed Facebook is popping up on sites all over the web. You can like, share, login, or even comment on blog posts, news articles, or any other page of a website. In typical Facebook fashion, developers used to be able to add either a "share" button or a "like" button to their website pages. The difference was that the like button was a simple click and notification that you "like" the page. There was no other effort on your part to write a comment, or anything else. The "share" allowed you to not only write a comment, but to edit the information (title, description, image) that was to be shared – giving the user a bit more control.Both would show up in the news stream, and on their wall, but the like was a simple line saying "Bob likes the blah page". The "share" showed up with a graphic, the comment, and the title and description of the page.
This allowed for more noticeability in the very busy news feed of the user’s friends. In most cases I would personally choose (and recommend) the "share" button.
And so did Facebook...
In recent developments Facebook has changed how the "like" button behaves making it more like the "share" button – allowing the user to "like" something, giving them the option to make a statement about it, and showing up more prominently in the news feed. So now when you setup your "like" button there are a couple of different options you can choose. 1) choose the word "recommend" or "like" in the button itself. 2) choose the layout style of Standard, Button Count, or Box Count.
So now when you "recommend" or "like" a page it gives you the option to say "what's on your mind?" adding a comment to the item in the news feed.
And instead of showing up in the news feed as "Bob like the Blah page" it now shows up more prominently with a graphic, title, and description.