For what reason can a site lose positions sharply and how to find the reason?

Question

Search Engine Optimization

Hello. There is a web studio website (landing page). Google promotion in Ukraine. Promoted independently by permanent links. The site itself rose in positions, then fell, although it had not been promoted for more than a year.
recently bought more links on 5 sites (sitforuma.ru and its similar ones - sites are very rated. tys 1000). There is a description of 5 web studios with 5 links in one article. ...
A week later the site rose in positions very well in the top 5, top 3, but after another 2 weeks it fell to almost zero, it doesn’t even get into the top 10 by requests.
Why can there be such a sharp decline? And most importantly, how would you advise to find the cause?
In my opinion, this could be due to recent purchases, since there were 5 links to different sites in the article.
Should I remove the link to my site from this article so that the positions are restored?

Answer 1

Most likely the search engine detected the purchase of links

Answer 2

Good afternoon.
1. Positions are not assigned once and for all. According to this, some +/- is normal. Why is it always asked on the forums - what to do if the positions have fallen? And for some reason they don't ask when the positions grow :)
2. The donor's rating is constantly (daily) changing and this affects the amount of transferred weight, and therefore the positions.
3. Search engines constantly (almost every day) update their algorithms and conduct various experiments, and only about the most significant of them they tell us. They rolled out the update - looked - did not like it - rolled back.
4. Look in the Console on all versions of the site if there is a message about the measures.
5. Penguin could disable link influence.
6. Competitors have improved and updated their content and backlink count.
More features - in different browsers, on different devices (even at the same measurement time), in different areas of the same city - the positions will be different.

Answer 3

Most likely the sanctions of the search engines: Pingin and Minusinsk. Google and heal. I sympathize, but if it's them, you won't see the old positions.
Be careful buying links.