Back in the 90’s, getting ranked in search engines could be as easy as manipulating the content of the title, description and keyword tags. Now, this is no longer true, with Search Engine companies realizing the potential for abuser and developing increasingly more sophisticated algorithms to figure out what a web page is about (and hence be found on). The Director of Research at Google, Monika Henziger, was quoted (in 2002) as saying, “Currently we don’t trust metadata because we are afraid of being manipulated.” The old days of keyword stuffing will now potentially get you penalized rather than ranked!
This article is not specific to Joomla.