Here’s an interesting discussion about the state of link building that you might find interesting. 8 Experts Weigh in on the Past, Present, and Future Evolution of Link Building on the Moz Blog asks how important links are, if the definition of a “high quality link” has changed, and where we should focus in our link building efforts.
Nowadays, Google can filter out many questionable approaches such as ‘guest posting’, according to one contributor, “which basically only leaves a handful of link building approaches: PR, targeted outreach, and content designed to get links.”
The article concludes that links remain a major part of how Google determines the expertise, authoritativeness, and trustworthiness of a site, and that relevant content will always perform so long as we target the right audience. It’s worth a read.