TF-IDF是用於衡量頁面上的關鍵字重要性的詞頻-反文檔頻率。與關鍵字密度不同，它不僅僅考慮該詞在頁面上的使用次數；它還分析了一系列更多的頁面，並試圖確定這個或那個關鍵字的重要性。
舉個例子，在汽車維修中，詞組“輪胎維修”可能比“渦輪增壓發動機維修”更重要，因為每輛汽車都有輪胎，只有一小部分汽車有渦輪增壓發動機。因此，“輪胎維修”這個詞將被更多討論汽車維修的頁面所使用。
這就是WebSite Audit中的TF-IDF報告所能捕捉到的！
通過查看您眾多競爭對手的關鍵字使用統計數據，TF-IDF公式將向您展示：
何時使用TF-IDF分析？
為什麼使用TF-IDF報告？
計算內容優化因素。同時，分析您的頁面對目標關鍵字的優化程度。
發現您排名靠前的競爭對手正在使用的關鍵字和短語
找到使用過少或使用過多建議的詞語和短語，看看您如何修改副本以提高相關性
TF-IDF報告的工作原理是什麼？
TF-IDF報告基於一個特定的公式，詞t在文檔d中，詞t在文檔d中的權重Wt,d由以下公式給出：Wt,d = TFt,d log (N/DFt)
最後的思考
HulkApps為Shopify提供全方位的TF-IDF報告服務，幫助像您一樣的商店所有者在文件/網站中提取最具描述性的術語...
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