If you notice that the site’s traffic has become much less, you need to inform the technical support of the search engine about where the traffic stopped coming from. There is no need to download rights, but you just need to clarify the situation and ask for advice on how to rectify the situation. If from the answer it will be clear to you that the reason lies in the content (re-optimization or non-unique), then you can correct the situation by correcting the text. It is quite clear that if your resource is a frank hs, then it is impractical to rewrite it, it is much easier to concoct another similar site. But it’s a completely different thing when you own a site for people. Then it’s worth the effort to fix it.
If you use a non-unique design, this can also lead to sanctions. In this case, the design will have to be changed.
If you have a commercial website, then indicate contact information on it. Indicate the location map, phone and other contacts on the site. But remember that sometimes yandex assessors are engaged in checking contact details, therefore it is better to indicate real contacts. On the information site, you must specify the contact e-mail.
If the navigation on your site is not up to par, then this should also be fixed.
All these tips are reduced to what you need to do sites for people that contain unique and interesting content and easy navigation. It will take more than one month to create such a resource, but it is worth doing.
If the text contains a large number of words, then it is better to reduce them. Some sites have simply huge articles. Moreover, they are insignificant, unformatted, they have no semantic emphasis. This text lies on the screen with a footcloth that is of no interest to anyone. Search engines do not like such texts. This does not mean that the text should be small in volume. It just needs to be informative, it needs to be formatted, and then the search engines will respect it.
You can exit the spam filter by cleaning the texts from the dominance of keys. The article should also be reduced in size if it is too impressive. In this case, “water” should be removed, but the essence should be preserved. Be sure to format the text, add subtitles. Of course, all this is not easy to do due to the fact that a lot of time will be spent, but your site will look like sweetie, and the likelihood of sanctions against it will be reduced.