Today, +1ís will start appearing on Google search pages globally. We'll be starting off with sites like google.co.uk, google.de, google.jp and google.fr, then expanding quickly to most other Google search sites soon after.
Adding the +1 button could help your site to stand out by putting personal recommendations right at the moment of decision, on Google search. So if you have users who are fans of your content, encourage them to add their voice with +1!
Go back one step. It's saying "Sign up for GWT and use it religiously because otherwise you would have no idea what the ### button is for or how to add one. Why, good heavens, you might not even be aware that the button exists."