IndexNow
IndexNow lets a site instantly notify participating search engines of new, updated or deleted pages.
Who uses it
Bing, Yandex and other participants; Google does not, so sitemaps and Search Console cover Google.
For reputation
Notifying engines quickly when pages are removed or changed helps old copies drop faster. This site pings IndexNow on every update.
Frequently asked questions
Does it cost anything?
No; a key file and a simple request.