You may have noticed that PC Advisor has added the Google +1 button to article pages on the site.

If you don't know what I'm talking about (welcome to the club), it looks like this: Google +1 .

But what is Google +1, and why have we added it?

In essence, Google +1 offers you the opportunity of giving a thumbs up to stories you think are useful, interesting or just plain good. It's a little like Facebook's 'Like' mechanism, and will be used by Google's search engine as an additional metric of whether a piece of content is good, bad or indifferent.

Or, to put it in Google's words: "Click +1 to publicly give something your stamp of approval. Your +1's can help friends, contacts, and others on the web find the best stuff when they search."

"Your +1’s are stored in a new tab on your Google profile. You can show your +1’s tab to the world, or keep it private and just use it to personally manage the ever-expanding record of things you love around the web."

You have to be logged in to your Google account to use Google +1, but when you are you'll see your contacts' +1's appearing alongside Google search results. You'll also be able to '+1' stories on PC Advisor and other sites. So if you particularly like a story you see on PC Advisor, give it the +1 and help other people to find it.

Below is a video from Google, explaining Google +1 in greater detail.