น่าจะเป็นประโยชน์กับทุกคนบ้างนะครับ ^ ^
Yahoo! Content Quality GuidelinesYahoo! strives to provide the best search experience on the Web by directing you to high-quality and relevant web content in response to your search query.
Pages Yahoo! Wants Included In Its Index :- Original and unique content of genuine value.
- Pages designed primarily for humans, with search engine considerations a secondary concern.
- Hyperlinks intended to help people find interesting, related content, when applicable.
- Metadata (including title and description) that accurately describes the contents of a web page.
- Good web design in general.
** Unfortunately, not all web pages contain information that is valuable to a user. Some pages are created deliberately to trick the search engine into offering inappropriate, redundant or poor-quality search results. This is often called ”spam.” Yahoo! does not want these pages in the index.