TF-IDF, or Term Frequency-Inverse Document Frequency, has long been utilized by search engines to score and rank a document’s relevance for any given search query. In spite of this, I think it continues to be a misunderstood or under-the-radar concept in the broader SEO world due to 1) “keyword density” being much easier to explain and 2) it’s like a word salad when you read it for the very first time. ...
In the first week of January 2012, I conducted a small research project where I manually extracted the text from SEO job postings on LinkedIn and plugged them into a word cloud generator called Wordle. I was curious to know what hiring companies nowadays are looking for when they want to fill an SEO position in terms of perception (job description) and qualifying factors (job experience). A small disclaimer: I make sweeping generalizations for each image so it may not apply to every position, description, experience or company. That being said, feel free to offer your own explanations in the comments section below as I am always open to hearing how others interpret this. ...