I dont think this really pertains to changes that made on google regularly. Not looking at when you search for a brand or website all together,obviously you will show up.
But searching for some keywords in a topic we were ranking against other forums at least on mid and bottom of first page and just checked yesterday, now we are gone from google. The forums ranking dont have any special SEO tricks. Just an someone posted a question about them and maybe 2 or 3 responses.
Googles last core update was a month ago it seems. Im not sure why we dropped off completely on certain terms. But I’ll try to make some changes at least in content. What I do notice is that some of the pages of other forums its showing the page ranking as say page 4. Im not sure how its handling the loading on discourse for how it searchs. But we have threads hundreds of comments long that dont show when searching the topic.
I dont see anything in the whats stated that would be reason why mine is dropping and other forums are ranking much much higher with less content and responses.