How long will a landing page last in a search engine without updating the content?

Question

Search engines

Good afternoon!
To be honest, I know little about how search services like Google or Yandex work.
The following question arose: if I create a landing page and do not promote it in any particular way, and, most importantly, update the content, will the page be removed from the search results over time?
Thank you!

Answer 1

Will not be removed from the PS index.
Usefulness and relevance - affects the relevance when issuing.