Comment by Kim_Bruning

Take a look!

* https://en.wikipedia.org/w/index.php?title=Main_Page&action=...

It's a large number of templates doing transclusions.

* https://en.wikipedia.org/wiki/Help:Transclusion

You can have snippets like this

* https://en.wikipedia.org/wiki/Wikipedia:Today%27s_featured_a...

Which shows up on the main page under featured article, and these pages are prepared by humans Just In Time:

* https://en.wikipedia.org/w/index.php?title=Wikipedia:Today%2...

A website where everything happens in public -including all the editing- is still kind of cool and relatively unique, even in 2025!.

And most pages are a bit less complicated to handle than this. But the main page obviously gets a lot of attention.