Spamdexing, also known as search engine spamming or search engine poisoning, is the unethical practice of manipulating search engine algorithms to artificially increase the ranking of a website in search results. This is often done by using deceptive techniques such as keyword stuffing, link farming, and hidden text to trick search engines into thinking the website is more relevant and authoritative than it actually is. Spamdexing not only undermines the integrity of search engine results, but it also creates a poor user experience by directing people to low-quality or irrelevant websites. It is considered a black hat SEO tactic and can result in penalties or even removal from search engine indexes.