NOTE: Altavista, All the Web and Inktomi are all owned by Yahoo!, so the Yahoo! spam policies and webmaster guidelines also apply to these search engines.
According to Yahoo!, search engine spam is webpages “that are considered unwanted and appear in search results with the intent to deceive or attract clicks, with little regard for relevance or overall quality of the user experience.” Officially, Yahoo! does not want to index sites with:
- Text that is hidden from the user
- Misuse of competitor names/products
- Pages that have substantially the same content as other pages
- Multiple sites offering the same content
- Pages in great quantity, which are automatically generated or of little value
- Pages dedicated to redirecting the user to another page
- Pages that give the search engine different content than what the end-user sees
- Pages built primarily for search engines
- Pages that use excessive pop-ups, interfering with user navigation
- Pages that use methods to artificially inflate search engine ranking
- Sites with numerous, unnecessary virtual hostnames
- Excessive cross-linking with sites to inflate a site's apparent popularity
- Pages that harm the accuracy, diversity, or relevance of search results
- Pages that seem deceptive, fraudulent, or provide a poor user experience
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