TF-IDF代表文档频次逆文档频率，用于衡量页面上给定关键字的重要性。与关键词密度不同，它不仅仅看关键词在页面上的使用次数，而且分析了更多的页面，并尝试确定该关键字的重要性。
例如，在汽车维修中，“轮胎维修”这个词可能比“涡轮增压发动机维修”更重要——主要是因为每个汽车都有轮胎，只有少数汽车有涡轮发动机。因此，“轮胎维修”这个词在谈论汽车维修的更大范围的页面上使用。效率更高。
这正是WebSite Audit中的TF-IDF报告能够捕捉到的内容！
通过查看竞争对手的关键词使用统计数据，TF-IDF公式将向您展示：
何时使用TF-IDF分析？
为什么要使用TF-IDF报告？
计算内容优化因素。还分析您的页面在目标关键词上的优化程度。
发现您排名靠前的竞争对手正在使用的关键词和短语
找到使用较少或使用更多建议的单词和短语，以查看如何调整您的副本以提高相关性
TF-IDF报告的工作原理是什么？
TF-IDF报告根据特定的公式工作，在文档d中的术语t，术语t在文档d中的权重Wt,d由以下公式给出：Wt,d = TFt,d log (N/DFt)
最后的思考
HulkApps为Shopify提供全能TF-IDF报告服务，帮助像您一样的店主提取文件/网站中最具描述性的术语...
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