tf–idf, short for term frequency–inverse document frequency, is a numerical statistic that is intended to reflect how important a word is to a document in a collection or corpus. It is often used as a weighting factor in information retrieval and text mining.The tf-idf value increases proportionally to the number of times a word appears in the document, but is offset by the frequency of the word in the corpus, which helps to control for the fact that some words are generally more common than others.Variations of the tf–idf weighting scheme are often used by search engines as a central tool in scoring and ranking a document's relevance given a user query.
Posts about Tf-Idf
  • On-Page SEO Part 2: Optimizing Each Piece of Content for Search

    …. However, the simple presence of your keywords will never be enough to rank your content in today’s high-competition search environment, and if you overdo it, you can expect to be penalized. Today, there’s even more to it than keyword frequency. Google also has several patents that indicate the value of Term Frequency – Inverse Document Frequency (TF-IDF…

    ImageWorks Creativein SEO Content- 8 readers -
  • Google’s Query Language

    … in that browseable fact repository. It is about a query language that, like the train in my town, may have seen its time slip by. As far as I know, there really hasn’t been much of a discussion on the web about this “query language” patent, or the idea of specialized queries solely for Google’s Knowledge graph. Google seems to be moving towards a united…

    Bill Slawski/ SEO by the Seain Google Facebook- 26 readers -
  • More than Keywords: 7 Concepts of Advanced On-Page SEO

    … much of an influence on your page's ranking potential. 2. TF-IDF It's not keyword density, it's term frequency–inverse document frequency (TF-IDF). Google researchers recently described TF-IDF as "long used to index web pages" and variations of TF-IDF appear as a component in several well-known Google patents. TF-IDF doesn't measure how often…

    Moz Blogin SEO Google- 25 readers -
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