It’s a big day for buttons today. Twitter just introduced its new Follow button and thanks to an unfortunate leak, we also know that Google is planning to launch it’s +1 button for third-party sites tomorrow. Twitter’s Follow button has long been overdue. It allows site owners to give their visitors a chance to follow their accounts with just a few click. Google’s +1 button is part of the company’s efforts to add more social signals to its search results. Whenever somebody +1s a story on a third-party site, this information will appear in their friends’ search results if that page appears (and can also push sites up on their friends’ search results pages).