Among the techniques that can downgrade a page's rank on the search engines are:

Question

Quizplus · Accepted Answer

Both flash pages and links from sites with questionable or irrelevant content can negatively impact a page's search engine ranking. Flash pages can hinder search engine crawlers due to their content not being easily indexed, and links from questionable sites can reduce a site's trustworthiness and relevance in the eyes of search engines.

Among the Techniques That Can Downgrade a Page's Rank on the Search