- Metadata is generally described as "data about data." On a very simple level, this means that it describes the actual data in some way. There are different types of metadata, but in relation to Joomla, we are talking about metatags such as description and keywords that are accessed by search engines and web browsers in order to learn something about the content on your website.
Metadata has been a very hotly debated issue over the years, and it is now thought of as quite a bit less important in terms of search engine rankings and overall Google performance. Tags such as description are still very useful, but the approach to metadata in web development has changed dramatically.