Does non-unique content (articles) have a noticeable effect on the position of the main page of the site, which has completely different key queries?

Question

Search Engine Optimization

Does non-unique content (articles) have a noticeable effect on the position of the main page of the site, which has completely different key queries? And is it worse than not filling the site with different material at all?

Answer 1

For Google, it has a strong effect, you can grab the filter, it’s generally easy, and Yandex doesn’t like such sites either!