It is all about groups of people with passions in common talking to one another in their own voice.

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Metadata is one of the most misunderstood aspects of content management and website design. Metadata is a fundamental skill that web writers and editors must acquire. Metadata is the: who, what, where, when and how, of your content. It is that 30 second elevator description. Metadata may include: heading/title, summary/description, author name, date of publication, geographic classification, subject classification, keywords.
Metadata gives your content CONTEXT. Metadata le da "contexto" a tu contenido, a tu publicación.
Content that does not have effective metadata is not web content. It is sloppy, next-to-useless print content that has been unprofessionally published on the Web.