How is it possible that having an ezine may help SEO and Google relevancy scores?
There are a number of answers for this. Firstly, if you are running Adwords, then Google wants to see a ‘real’ site, not just an opt-in page. By adding an ezine page to your site every week, you are growing your website, just like any ‘real’ site would grow. Also, increasingly, the search engines seem to be placing more importance on websites that are regularly viewed by visitors – so directing subscribers to your site is definitely a good thing. So, as your ezine helps grow your site and helps it receive regular visitors, then it will only help in terms of being ‘relevant’ to your niche. Of course, on its own, this won’t be enough to rank for a particular niche, but if you got some links to your site, then it certainly will add to its credibility, both in the eyes of the search engines, and humans.