More and more frequently search engines are ranking websites based on the feedback they can gather from social activities on the web. Search engines like Google figure if someone likes your page it's more relevant. Therefore they're more likely to rank that page well amongst their search results. When a visitor to your webpage Likes or Tweets your page a search engine looks at that like a vote. So basically Google looks at it like a free human review. It's highly unlikely spam pages or link farming pages will receive many likes.
WebStarts allows you to use this to your advantage. We've integrated Facebook and Twitter into our website builder. You can add a Facebook Like button or Twitter Tweet button with one click. All you need to do is login to your account and choose to edit any page. You can then click on the Facebook or Twitter icon on the tools panel. That will allow you to easily add the buttons to any webpage. Make sure you ask your site visitors to like or retweet your page and you'll be well on your way to driving more traffic to your website and getting better search engine rankings.