Can someone explain HTML file

Answer 1

HTML stands for Hyper Text Markup Language. An HTML file is a text file containing small markup tags. The markup tags tell the Web browser how to display the page. An HTML file must have an htm or html file extension. An HTML file can be created using a simple text editor.

Answer 2

https://study.com/academy/lesson/what-is-an-html-document-structure-types-examples.html