Delisting is when a website is no longer listed by search engines, i.e. when the relevant database is deleted from the search engine.
Search engine operators delist a website if it no longer exists, if the web server on which the website was present cannot be reached, or if the website publishes illegal content. In addition, delisting is possible at the request of the website operator or by the search engine if it has detected spamming or cloaking.
Delisting means that the website is deleted from the search engine index, the listing, and is no longer listed in the results pages( SERP), it loses awareness and can no longer be monetized.