It is the right tool for pages that exist for visitors but not for search: a login screen, a thank-you page, a filtered listing, an empty category waiting for content. Engines keep crawling the page, drop it from their index within days or weeks, and keep following its links when the rule is noindex, follow.
Two mistakes are common. Blocking the page in robots.txt as well, which hides the noindex from the crawler. And leaving a noindex on a page that should rank after a redesign: Search Console lists the pages excluded by noindex, worth checking after every launch.