Joomla provides a great system for including metadata keywords and description on articles. When editing an article there is a spot on the right hand side of the page to edit the keywords and description ( it ’s under “Metadata Information”). This information is used to provide the tags for the page and to connect pages using the standard related articles module that comes with Joomla .

But what if you don’t want to have to think up and type in keywords and description every time? Wouldn’t it be nice if the related articles plugin could just always work on the full text of articles? That’s what this plugin solves. Whenever you create or save an article, this plugin automatically fills in keywords and description for you.

It does this for the keywords by:

Parsing all the words in the article and ordering them by number of times used (you can choose to generate keywords from title, content or both)
Removes the most common words in your language from the list by comparing it against a blacklist
Adds the top words into the keywords section (Limit keywords by length or number)
After saving the article you can also make some changes and any words you add to the keyword or description section will not be overwritten when you save. But what is with that many old articles without keywords?
This version adds the ability to regenerate keywords for all articles in the database. Simply set the option to “Yes”, reload "home" and set it back to “No.” All articles in the database will now have keywords. You can save, delete or change the keywords for all articles by changing the options "Regenerate All Keywords and save it " and "Minimum Word Length" or the "Keywords-Blacklist".

If you are not using "save by writing" then the description and keywords aren't saved in the article but the searchengine can get it from the sourcetext, because they are generated "on the fly".

The Keywords-Blacklist is german but you can change this in backend.