When a URLUniform Resource Locators are the locations or addresses for... More, section of URLs, or an entire domain has been removed from a search engineAn information retrieval program that searches for items in ... More indexA huge database of all the content search engine crawlers ha... More. This can happen for a number of reasons, such as when a website receives a manual penaltyRefers to a Google “Manual Action” where a human reviewe... More for violating Google’s quality guidelines or when a webmaster requests the removal of these pages.