Keyword Stacking
 

Keywords stack is SEO beginners the most common mistakes, they generally in the title tag, description tag, keywords tag, pictures of the ALT attribute - instead of repeat in a large number of keywords. Sometimes, they in the web page footers part put on dozens of keywords.

Keywords stack is a typical kind of SEO cheating, search engine judge this cheating behavior of the algorithm is already quite mature, so, once appear on web pages keywords superposition phenomenon, generally the entire site will be search engine seal off. Many websites are not search engine included, often is also for this reason.