Keyword Stuffing
While most search results are useful and informative, not all are created equal. Some content on the internet is not relevant to what search keywords were entered into Google. So how and why do these fairly useless pages end up high in the Google results?
The answer is keyword stuffing. This is a way to redirect traffic to a webpage based solely on the keywords on that page. There is often no useful information related to the search but the page scores highly in the ranking system. Keyword stuffing is achieved when unrelated words are hidden in a page as the same color font as the background color. Another way is to repeat a certain keyword or phrase over and over, so to make it appear more useful than it really is. Lastly, one could add in random words in no particular order to draw in search engine and not spend any effort to hide the keywords.
These fairly useless pages that come up due to keyword stuffing face a huge risk, Google can remove them from the search results. While there are short-term benefits, like getting more traffic to a (probably bad) page, there is no sustainable way to keep this going, as Google will ban the page. The reason search engines do not like keyword stuffing is because it is beating the system in their eyes; it is beating their algorithm.
This ties into the class when we discussed various ways to rank search results. While searching for keywords on specific web pages is outdated, it is still a way to rank pages, much like using links for votes in the results of a search.
http://www.wordstream.com/blog/ws/2012/03/21/dangers-of-keyword-stuffing