How to notify search engines of short-lived links?

Question

Search Engine Optimization

Content lives on the site for an average of 14 days. As far as I know, search engines don't update sites that quickly. And if they update, then after the expiration of the term, when switching from search engines, users get to a 404 page. How to notify search engines about adding and removing content?
Add. related question :
Toaster has new questions appearing instantly on google, how is that possible?

Answer 1

https://site.yandex.ru/cms-plugins/
at the link there are lines:
maybe it will speed up indexing.