No matter with your browser, HTML, CSS, JS all have same purpose to be interpreted by browser to show clients a web page
HTML
Hyper Text Markup Language
The origin of Markup
Markup Language is based on the markup that used to be put into manuscripts where editors would mock up the manuscript Markup either specifies changes to the author or specifies structure and layout to the publishers
HTML works same way with Markup by using HTML tags
Let's deep into HTML