Yeah man, this is really, really odd.
One morning one keyword went -85. Then poff, the next day it was n/a again.
It gets even worse when I compare my sites that aim for the same keywords. The worst website of them all is ranking, the good sites are tanking.
The most extreme example is one commercial keyword that I was ranking on first page with two websites. Let's say the keyword is "Men's costumes".
Site 1 lost the keyword, it's now n/a. Site 2 kept ranking for it, around 5th place.
Site 2 has a heavy picture load (not optimized, at all). It has an outdated theme. The articles are extremely poorly written, both the information and how the articles are designed. The bounce rate is very high. The site has a poor and spammy link profile.
Site 1 is optimized and very fast. Articles are well-written and the bounce rate is low. The link profile is very good and relevant to the keyword.
It's like a comparring a Ferrari to a go-cart. Yet, site 2 is ranking on "Men's costumes" and site 1 tanked it. In fact, site 2 is ranking very high for a lot of keywords - while site 2 is tanking.
Makes no sense at all, neither for my SEO brain nor as a consumer. Nobody wants to read site 2. Site 1 is better in every kind of way. The only reason to I could see it ranking higher is because site 1 is older, nothing else.
Yeah. I'll give you my example.
There's 3 keywords.
1) Blood pressure A B
2) Blood pressure A B C
3) A blood pressure B C
keyword 1 prior to update: 5, then moved to 10, then to 80, then to 100+ (disappearing), as of today it is still out of top100.
keyword 2 prior to update: 3, then 10, then 16, now recovering and climbing to rank 3 again.
keyword 3 prior to update: 2, then 15, then 40, now recovering to top10.
The thing that haunts me here is what the heck is wrong with keyword 1? It is closely related to keyword 2 and 3. Why removing this one from serps and leaving 2 other very similar keywords? I checked, and I am not even on page 18 (results end there). And I don't need to tell you what kind of results are there from page 10 - 17. If those sites are deemed more suitable for Keyword1 than my website (which is in fact directly related to main keyword and has some nice links), then google is broken. Of course my content is well written and in fact it is also fact-checked (I do have morals and I don't want to give out bad advice).
Sure, I accept that algorithm is prone to error and anomalies can happen. But going from 3 to 199 position? To be that much way off? How wrong could the algo be before the update then that it misfired so much?
The only difference is that keyword 1 has 10,000 monthly searches, keyword 2 has 600 and keyword 3 has 300. It's similar with other keywords. So what I believe it might happen is the following. Google took a closer look at health (and other niche) related keywords with noticeable traffic per month and sort of rearranged them in a way that only high authority websites can be displayed in top 10 (and top 100, too). And here's your EAT thing right there. Nicely masked. But the authority of those sites is still determined by links, mostly. Its either that, or they're manually setting the SERPs for high traffic, profitable keywords. These are keywords that, if wrong advice is given, can cause harm to people, and I understand that the results must be filtered well. But then again how can google distinguished that the given advice from a site that sits, lets say, on position 8, is still not giving wrong advice? Only by manual review.
If they really care about people, that is. Probably they're more concerned with people suing them after "reading ILL advice on google".
These fluxes doesn't make sense to me otherwise, and being in SEO for almost 10 years I've seen some serious updates and fluxes. But never that severe and I never saw a site only be "partially hit" in a sense that long tail keywords of a main keyword still rank, while their high traffic main keywords drop out of top 100?!!