Besides adding 5 backlink-related factors, we also analyzed all the factors at a more granular level: we explored how each factor influences not only the entire domain, but also a single URL in rankings, in order to figure out the pros and cons of ‘URL specific’ versus ‘domain-wide’ approach to SEO.
Read the updated study to find out how (and if at all) you should refocus your optimization efforts to see your rankings grow.