The short code block lets you insert shortcodes into your posts and pages. It can also be used to embed some external media.

Shortcode Block – Documentation – WordPress.org

Some shortcodes are provided by Plugins, for example the Display Posts plugin, the Draw Attention plugin and the Mega Menus plugin all provide shorts codes to help insert content into your blog.

The Above shortcode, from the display posts plugin, shows the following list of pages.The id of the Basic Setting page is 91 so it shows a list of all the children of that page.

• Top Toolbar
• Block Toolbar
• Distraction Free
• Adding Blocks

Flickr

Here is a flickr url in a shortcode block:

Youtube is the same:

Micro:bits

[glowmicrobit url="69362-76330-54511-95403"]