Hi everybody - it's reassuring (albeit disappointing) to learn everyone else is experiencing similar anomalies and issues with traffic, conversions, et al. I was provided some insight on this September update and the possibility that it was intended to largely build off the June Core Update. Here's an excerpt from Traffic Research:
"In general I wouldn’t give too much credit to anyone who claims to have the absolute answer, as it’s still pretty early to have done deep data dives. But, I’ll give you my early thoughts at least. To me it’s looking like an expansion/tweaking of the June core algo update. We’re fairly certain that June was mostly a link-based update, basically just making them more important. This one looks like it’s probably the same, except it’s possible the link relevance became more of a factor. Here’s a really good data based deep-dive into the June algo update that is worth a read:
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mytrafficresearch.com...]
It’s worth reading in its entirety, but the TL;DR is that in a lot of niches where Google had problems showing trust-worthy content (health, crypto, etc) the algorithm just turned up the dial on the importance of links, possibly specifically the link authority of the overall domain. Look at your niche and any changes using that point of view and it might make more sense. Although it’s great to fix all the other stuff, no real changes will happen in this case without juicy link-profile improvements.
Think about it from Google’s point of view. Let’s take health for example. So many alternative health sites, Amazon affiliate plays, and mommy-bloggers were taking over the health niche. The algo was having trouble discerning what was quality and what was not. Just turn up the dial on the links. Now it’s all Healthline and WebMD, a lot of which is garbage, but it is very obviously the “safe” play for Google. No small site could ever compete with those behemoths on link profiles.
As for the Sept update, seems like it expanded more to other niches as well.
Again, take it all with a grain of salt, but that’s my theory for now.”