What is going on with Google?

The site completely disappeared from the search
Why did the site ****** fall out of the Top? For key queries, it is not at all.
The site has plummeted in SERPs.
What happened to google? The site has dropped out of issuance The site has dropped out of
search results!
The search engine site output has fallen sharply.
In the statistics of Google search engines, there is no and there is not a single entry to the site from the Google system?
The site fell on all positions from Google, but in the panel of instances it shows that everything is fine

This is what appeared here yesterday, today at the Google forum for webmasters .

In short, everyone has the same problem: the site simply disappears from the search results without explanation (personally, I yesterday the number of clicks from Google decreased from 70-80 per day to 10, today not a single one at all; I checked for requests that took several days to go back - then for these requests the site was on page 1-2, now not on the first ten). It looks like a ban or a filter, but, firstly, in the toolbar it says that everything is fine and the pages are included in the index, and secondly, can’t this happen so abruptly with several completely different sites?

Since the best search engine in the world does not have normal support, and apparently you can’t count on the answers, I would like to ask the community if anyone has such problems? Who sees the possible causes of this, and what are the ways to solve the problem?