Case Study: Using E.A.T. SEO to Increase Site Authority & Revenue

By | October 13, 2021


With Google announcing core algorithm updates and other algorithm changes every few weeks, it’s hard for an SEO to keep up. But, if you’re in the medical eCommerce space, there’s one concept you really need to pay attention to.

E.A.T. SEO.

This search ranking factor has been around since the 2018 Medic Update, and our SEO experts have been testing and evaluating it ever since. With properly implemented strategies, we’ve found great success for our medical eCommerce clients — including one who saw a 300% increase in organic revenue YOY.

In today’s blog, we’ll dive deeper into exactly what Google E.A.T. is, how to optimize for it (using our client as an example), and what kind of results you can expect.

What is E.A.T. SEO?

E.A.T. stands for Expertise, Authoritativeness, and Trustworthiness. The concept was introduced as part of Google’s ongoing efforts to deliver not just relevant content to its users, but also content that was accurate and trustworthy

E.A.T. SEO came into being around the same time as the infamous 2018 Medic Update, which impacted many health and medical advice websites, including a few of our own clients. Other impacted sites included those in the “Your Money or Your Life” (YMYL) group.

Google’s goal was clear: When it comes to health, financial issues, legal advice, and safety, content needs to be top-notch and accurate to protect searchers.

But the E.A.T. concept doesn’t just apply to copy on your website. It also applies to your blog authors, too.

The more credible and experienced your blog authors, the more trustworthy your site content will be deemed in turn. Author bios and pages became important real estate for communicating to Google expertise, authority, and trustworthiness (so much so that you’ll be hard-pressed to find a blog without author pages nowadays).

We could go on for days about Google E.A.T., but, if you want to learn more, we recommend Moz’s thorough writeup on the subject.

How to Improve E.A.T. SEO: A Case Study

So, how does E.A.T. SEO actually apply in the wilds of the internet?

In our work with health and wellness clients, we’ve identified two strategies that really move the needle on this concept:

  1. Make sure your website content is high-quality and as accurate and medically sound as possible.
  2. Incorporate trusted medical experts into your content marketing strategy.

We’ll walk you through these two strategies in action with a real-world case study from one of our clients (brand name withheld by request). 

A little background: Prior to our partnership, this client failed to garner any growth in blog and foundational website content over a period of more than a year. Because they were wholeheartedly entrenched in the health and wellness niche, we hypothesized E.A.T. SEO was the issue — and came up with a custom eCommerce SEO proposal to address it.

Here’s what we did:

Step 1: Create accurate, medically sound content.

Thanks to E.A.T., all medical content (including health and wellness content) is heavily scrutinized by Google’s algorithm. Websites can be severely penalized by search engines when making medical claims, so any “medical” content must be approached carefully and with a detailed strategy.

To meet these standards (and, in turn, boost organic performance), our client needed to establish itself as an authoritative source for information in its eCommerce niche — without selling “medical advice” and angering the Google gods.

There were a few key parts to our comprehensive SEO E.A.T. approach for this client.

Update Top-Performing Content First

To get the most out of our E.A.T. strategy, our SEO team began with the path of least resistance: updating older content that was already performing well but had much more opportunity for growth.

We knew that our client’s site had to have authority to grow its authority. So, rather than update poor-performing content, we started with the top 20 blogs already bringing in traffic and users. We double-downed on what was already working, optimizing for keywords and adding more detailed, helpful educational content to these blogs. 

(Revisiting these top performers also would reveal opportunities for not only that specific content, but also for more downstream content later on.)

SEO isn’t often an obvious cause-and-effect strategy, but it’s clear our content updates worked. On one particular blog updated in May 2021, traffic shot up 1100% month-over-month thanks to our changes.

Ahrefs organic traffic, organic keywords, and traffic value graphs, all three of which show dramatic increases after May 2021.

Linking to Authoritative Sources

Our comprehensive updates involved adding well-researched and informative content to the blog — and we wanted to make that obvious to Google with a top-notch external linking strategy. 

In accordance with medical standards, every claim made on our client’s site is backed up with proof from credible authorities like the National Institute of Health, academic and scientific journals, and published studies.

Step 2: Incorporate medical experts as content authors.

How else did we ensure our client’s content was medically sound? By asking subject matter experts for some help.

Our strategy: Have objective, third-party medical experts review our website and blog content, and make it obvious to readers that all the content had passed medical muster. 

We also avoided any schema markup that would indicate that content was “medical information” to Google.

As part of this, we added a “Content Medically Reviewed By” box to every webpage, with the name of the associated expert/author for that post. This markup sent signals to Google’s bots of the content’s credibility and authority, in adherence with E.A.T. standards.

And it worked! Keyword footprints and organic traffic metrics quickly increased for updated blogs, as you can see in the Ahrefs graph below. This particular blog was updated in April 2021, and we began to see organic improvements not long after.

Ahrefs organic traffic, organic keywords, and traffic value graphs, all three of which show dramatic increases after May 2021. Lines drop off around August. 2021.

Creating an “About the Experts” Page

To further boost the credibility of the third-party experts reviewing this content, every “Content Medically Reviewed By” box on a web page links to an “About the Experts” webpage. Here, readers (and Google’s bots) can find more information about these medical reviewers, including their qualifications and certifications.

With this “About the Experts” page, we signaled to Google that our client’s chosen experts were worth listening to — and worth a high rating from the quality score team.

The Results: E.A.T. SEO is Worth the Work

With just a few months of E.A.T. optimization under its belt, our client started seeing staggering results. And, when we look at the whole scope of the 14-month, 26-page project, it gets even better:

  • 291% increase in organic sessions YOY
  • 279.5% increase in organic users YOY
  • 295% increase in clicks YOY
  • 375% increase in organic impressions YOY

While all this is great, what really mattered to our client was the revenue numbers. Was the project worth the squeeze?

Most definitely.

Thanks to a 235% increase in organic goal completions year-over-year, our client saw a total 300% increase in organic revenue from this SEO content strategy alone!

Bar graph showing steady increase in organic sessions and users from March 2021 through July 2021. Sessions increase 24% month over month and 291% year over year. Users increase 22.8% month over month and 279.5% year over year.

The bottom line: Whether your eCommerce business is firmly planted in or simply has a few products in the health and wellness industry, E.A.T. SEO cannot be ignored. With just a few optimizations, you can take your content from passable to industry-leading — and Google will reward you for it.

Need help putting together your personalized E.A.T. strategy? Our eCommerce SEO experts are always happy to help. Request a free proposal anytime to find out how E.A.T. and other SEO factors can boost your site’s organic performance.



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