Indeed, what @Ade Vitan said is true. Getting visits is one thing, but bringing targeted visits back to your website is what you should aim for. Targeted traffic increases conversion rates and revenue, factors which are essential for business success. Yet, with Facebook being so popular, look to build a community within niche fields, with interested people - in other words - show what you have to say to people who want to hear.
After HummingBird Update only Social Signal remains the last hope of SEO, so i think facbook updating is the best practice of SEO, I not only suggest facebook but also use all the Social Media channels to make your website popular among them to get a keen eye of google upon your site and increase your site rankings. Hope this will help. Thanks Regards