What is markup language ??? Is there anyone can explain this in simple words ???

Answer 1

<post>
<answer>
A markup language uses tags (<tag></tag>) to annotate a document and thus bring more information about its content.

In HTML, this information is used by browsers to display the right elements, how they are organized, etc.
</answer>
<related>
See also XML for a generic markup language.
</related>
</post>