Will Yandex and Google see key search queries if they are hidden?

Question

Search Engine Optimization

When ranking a site, the algorithms refer to the keywords contained in the content. Can I make keywords or phrases and hide them with display:none?

Answer 1

Bad idea https://developers.google.com/search/docs/advanced...
Read all the methods of black SEO wezom.com.ua/blog/chto-takoe-black-seo, otherwise something else may come to head)

Answer 2

Yes, they can still give a ban for this

Answer 3

Do you need it?