未来趋势 :

根据一份最新的数据分析(MARKET WIRE)，目前在搜索引擎上搜索的关键词中，含有一到两个字的关键词比例降低5%（在过去的12个月中）。而含有四个以上字的关键词的比例显著上升19%。越来越多的网民使用精准的短语去搜索而不是简单的一两个单词。

一到两个字的关键词比例减少，说明一到两个词的搜索结果已经不能满足网民的需求，或许原因是SPAM的泛滥。

随着长尾趋势的来临，要做好SEO需要越来越多的考虑长尾的词，但是绝不是说把SEO COPY中的单词替换成短语，而是可以通过“Broad Match”等方法来实现。

虽然含有四个以上字的关键词使用比例在增加，但是四个字以上的关键词绝对比例仍然不足10%，所以在做SEO的时候仍然不能忽视一到两个字的关键词。

原文：

ELGIN, SC -- (MARKET WIRE) -- Feb 24, 2009 -- The length of search engine keyphrases continues to grow. Rather than a single keyword, searchers are now using three- and four-word phrases as the standard, according to newly released information in February 2009 by Web analytics-company Hitwise.com. These increases make the task of writing natural-sounding search engine optimized (SEO) copy increasingly difficult. Now, SEO-copywriter Karon Thackston has a quick-read ebook that details 11 clever and legal ways to include long-tail keyphrases without destroying the flow of the copy.

In the last 12 months, one- and two-word search-phrase use decreased by as much as 5%, while four-, five-, six-, seven- and even eight-word search-phrase use increased by as much as 19%. What does this mean from a copywriting standpoint(TM) Writing with a single keyword in mind is easy. Using two-word terms is a bit more of a challenge. But, when three- and four-plus-word phrases come into play, the risk of sounding stiff and awkward increases substantially.

"The biggest mistake I find search engine optimization (SEO) copywriters and website owners making is attempting to substitute every generic term for a specific keyphrase," recounts Thackston, who has been at the forefront of SEO copywriting for 10 years. She continues, "This makes copy sound very amateurish and clunky. The reason for this repeated mistake is because copywriters and site owners use the keyphrases the same way every time. They don't realize they have other options. There are numerous ways to make SEO copy sound natural."