精确匹配域名（EMD）
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精确匹配域名（EMD）是指与搜索关键词或短语完全匹配的域名。EMD 曾为 SEO 提供显著优势，但谷歌 2012 年的 EMD 更新降低了低质量 EMD 网站的排名加成。
示例
cheapflights.com and hotels.com are exact-match domains for their respective search queries, carrying both brand value and keyword relevance.