Improve SEO by optimizing social widgets performance
Your page speed is a factor for Google to rank your site. It might be a small factor but still: performance matters. The speed for your site can be seen in Google webmasters, but the important thing to know is that the speed is measured by full page loads, including all resources from third-party resources like widgets. So, since everybody is using widgets from Twitter and Facebook nowadays, it's a good idea to optimize those. In fact, facebook blogged about howto do that themselves on their developers blog.