The first component of Google's trust has to do with age. Age is more than a number. But it's not just the age when you first registered your website. The indexed age has to do with two factors: i) the date that Google originally found your website, and; ii) what happened between the time that Google found your website and the present moment in time.
In a number of recent articles, where I've interviewed some of social media's rising stars such as Jason Stone from Millionaire Mentor, Sean Perelstein, who built StingHD into a global brand and Nathan Chan from Foundr Magazine, amongst several others, it's quite clear that multi-million-dollar businesses can be built on the backs of wildly-popular social media channels and platforms.
Off page SEO: This type of SEO focuses on all of the activity that takes place "off the page" when looking to optimize your website. "What activity not on my own website could affect my ranking?" You might ask. The answer is inbound links, also known as backlinks. The number of publishers that link to you, and the relative "authority" of those publishers, affect how highly you rank for the keywords you care about. By networking with other publishers, writing guest posts on these websites (and linking back to your website), and generating external attention, you can earn the backlinks you need to move your website up on all the right SERPs.