The advantages of syncing to your smartphone, and in turn social media, are pretty extensive. Counting calories, adding your total distances, or figuring out if you met long term goals are all things that can be tracked for you automatically. Not to mention using popular apps like MyFitnessPal or Runtastic to share with and build your local running community.
It never hurts to know that you have friends cheering you on or running alongside you, even it is only in spirit.