What you're describing is essentially known as a "doorway page," which is a well-documented form of "spamdexing" in SEO. These types of pages or websites are created primarily to manipulate search engine rankings rather than to offer meaningful content or value to real users. In other words, they serve the purpose of gaining visibility in search results, but when a user clicks through, there is little to no useful content available. This violates search engine guidelines, particularly those enforced by Google. Over time, Google's algorithm—especially the Penguin update—has been refined to detect and penalize such tactics. If a site is flagged for using doorway pages, it may be demoted in rankings or even removed entirely from search results.