The content you create should be shared on the social networks on which you're active. (And if you're not active on any, this is one of the reasons to get started.) Moreover, Google's algorithm considers social signals as one of its most important ranking factors -- socially shared content is a vote of approval, or at the very least importance, so it makes sense Google would consider it when deciding whether a post should rank well in organic search.
I’ve just set up my own website, now, and those early gigs have provided some great testimonials, which is a huge boost to confidence. I used Blogger for my own website – it’s free, apart from a fiver a year for a custom domain, and it’s surprising how versatile Blogger can be, with a little practice. I’m now ready to start doing all the things Neville recommends in the above article, and the future looks loaded with potential.