Anyone can explain this sentence in w3schooi?

Question

The sentence is "When displaying data in HTML you should not have to edit the HTML file when the data changes."
I can't tell the difference if I change the code in HTML. SO WHY ?

Answer 1

Why are you learning there ?) open our course and You’ll understand everything )

Answer 2

That seemed to be coming from the XML Tutorial if I'm not mistaken (providing links would generally help with establishing context, but the quote was helpful).

https://www.w3schools.com/xml/xml_usedfor.asp

HTML provides markup for describing the document structure. XML provides markup for describing the pieces of data.