As with all websites on the web you should take care of your Joomla Metadata so that it appears correctly in all of the Search Engines. In this article we will learn how to add Meta Description and Meta Keyword for Joomla 4 Article.
After login your Dashboard you should go to Article Manager > Open Article you want add Meta Description and Meta Keyword
Click On Publishing tab and Find Meta Description vs Meta Keywords option and add your desired details.

Once done, click save and close
You can check the results by viewing the article in the Front-end, then right-click and select View page source.