Google today released the +1 button to the whole Web. You should thus start seeing the +1 button appear on various sites all over the Internet.

The search giant has already partnered with a few sites that have adopted the +1 button: AddThis, Mashable, The Huffington Post, Rotten Tomatoes, Nordstrom, O'Reilly, Reuters, The Washington Post, Best Buy, TechCrunch, and Bloomberg. As for its own properties, Google says the button will be adopted on the Android Market, Blogger, Product Search, and YouTube.

Less then three months ago, Google added the +1 button to its search engine, allowing users to upvote search results. The plus one name comes from forums and similar discussion mediums where the term is commonly used to indicate agreement with a previous post.

In this way, Google is allowing its users to vote on sites and advertisements that appear in its search results. The company displays the sites that you and your contacts have +1'd so you can see who recommends what and make your decision accordingly (you must be signed into your Google Account).

With today's expansion, Google will have access to even more data on what content you approve of. This will help the company further improve its search results, make more money from advertising deals, and generally mine further data about its users. In short, it's the search giant's answer to Facebook's Like button.

"If you're a webmaster, you can get the +1 button code and learn more about implementation on our +1 webmaster site," a Google spokesperson said in a statement. "We hope you'll agree that +1 buttons across the web make it even easier for you to recommend content to your friends and contacts, and make search results even more helpful and relevant."

We already have Facebook and Twitter buttons at the bottom of our articles, so we're not sure if we need yet another one. What are your thoughts on the +1 button and do you want TechSpot to add it?