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First of all: what's TF-IDF ? In German this content parameter is called WDF / IDF , but the subject is the same: TF-IDF , term frequenc...

Pretty rare thing: free tools for TF-IDF calculation which indeed work

How to prevent negative SEO impacts caused by poor HTML quality

Making decision: hosting of javascript libraries on external CDN or locally

Solution for SEO of URLs with query strings

Freebase shuts down and integrates the database into Wikidata

How to hide webpage parts from Google indexing

How to SEO long URLs

How Penguin evaluates the link quality

How to create your own author-centered knowledge graph

How to adjust product search for best SEO and user experience

H for htaccess: part 5 of the HASCH the OnPage SEO framework | Mostly detailed .htaccess guide for SEO

How to implement authorship correctly

Since today HTTPS secured connection becomes a ranking factor, Google said. Here the solution how to redirect HTTPS to HTTP without a certificate!

how to evaluate correctly the backlink value

Undead SEO