Connecting your account to your Facebook Ads and Google Analytics accounts allows you to view the impact of your social media activities in one place. Here you can view the Facebook Ad Spend metric from your Facebook Ads account. From your Google Analytics account you can view Goal Completions from Facebook, Sessions from Facebook and Goal Value from Facebook.
You can also view the effectiveness of your organic performance. Learn how many Sessions you are getting from your social networks using the widget Organic Sessions from Social Networks. If you would like to see the results for individual social media networks have a look at Organic Sessions by Social Network.