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Widgets are a popular way to add extra functionality, features, and information to different locations of WordPress websites. They allow you to put anything from contact forms over calendars to lists of your latest blog posts on your web pages.
However, in order to do so, you first need widget areas — at least in classic WordPress themes. These are special designated parts of WordPress themes where, if you add widgets to them in the back end, they will show up in the front end as well.
Block themes using the WordPress Site Editor, on the other hand, no longer have widget areas. Here, adding widgets works very different than before, which is reason enough to cover this entire topic.