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Some webmasters stuff the keyword meta tag as well, although this is one of the oldest black hat SEO techniques and has caused most search engines to ignore the keyword meta tag. To avoid a penalty for keyword stuffing, use good Seo to write natural sounding titles for your pages, and do not add any text to a page that does not apply to the page's topic. More sophisticated webmasters spread out the keywords within the body of the text instead of piling them in a single paragraph. Search engines filter out pages that use this SEO trick by giving preference to pages with a certain keyword density, and penalizing pages whose keyword density is higher. Because of the eternal nature of spammers, the target density has been sliding ever lower for the past several years.