Since Joomla 3.1, there's an additional way to organize articles. Apart from using categories, you can now use content tags to classify articles (and other content, even categories themselves). This way, you provide the visitor with alternative means to find groups of content—not just by browsing content categories, but also exploring tagged content. Tags are displayed with every tagged content item; each tag will automatically link to a list of all content labeled with the same tag. Moreover, it's possible to assign as many tags as you like to any article—whereas, you can assign articles to just one category.

Both categories and tags are ways to group content. Moreover, both can be used as links to those groups of content; the visitor can browse content by category or tag. So what's the difference between categories and tags? Categories divide your site content in broad sections, whereas tags offer more precision in classifying content. A helpful...