Did not want to jump the gun on the day the big algo change hit live, but now seeing the aftermath I am puzzled.
Let me elaborate.
I command the SEO for three niche leading websites totaling upwards of 50,000 daily visits and ranking for 3k+ keywords in the top 3. All the websites are squeaky clean, with regular disavows, mentions and purely organically made featured articles in some very high-end websites including but not limited to regional national newspapers website, American express business blog, yahoo business and the likes. All three niches are not related to each other. One is B2C one is B2B and one is precious metal investments.
OK now the algo hits and what happened from my point of view and talking with the in-house SEO folks operating on some of those major news outlets was their sections or websites that are more heavily relying on outside expertise and opinion thus link to those businesses and experts got hit.
Crazy right? Well not really. Google gobbled up these SERPS and promoted more of their curated content. More youtube videos, more AMP visibility, Google news shifts, you name it. At the same time the strength signals of those high-value links were devalued and in turn brought down the business and niche information websites, freeing even more space for "top of funnel" information or Amazon product or chart/calculator type websites to be more prominent.
The more I look at it and talk with colleagues operating in different fields and niches I hear the same story. Google split the topical notes further and made them even more sensitive to past search history and search intent. This split and balkanization of the topics led to disconnect and loss of link strength because the sites who provided the links are not as closely related to the business as they were before. Because those links were mainly leading to the domain name of the business website, the latter sunk in ranking on all fronts, blog, information, product, everything.
Some websites, with big link portfolios and links coming from top of search intent websites, did not feel the drop, because the correlation was not lost, other who acquired mentions and links from various sources or spliced topics to create content that can appeal to a certain type of audience were slammed bad, because those links are now coming from different topic nodes and as such was not seen as valuable.
Of course, this is me, trying to look at the black box and judge it by its appearance and this is just a theory, based on observation and investigation.
If you have experienced something similar and I see some of you already have, feel free to put in your thoughts about the nature of the algo change.