Once the remit of Silicon Valley developers alone, search engine optimisation is now a major focus of digital marketing teams. Increasingly complex algorithms from Google have turned SEO into both an artform and a science, powering an industry worth over $135 billion. BrightEdge, the leading SEO and content performance platform, knows what this means for the landscape of marketing. Quill asked VP Agencies, Mark Mitchell what he considered to be the major SEO trends for the coming year.