Welcome to the ultimate tutorial on what HTML, CSS, and JS is, and how it's used in the real world.

Warning. This may be confusing to insolent readers.

HTML

Hyper Text Markup Language, HTML for short, is the base coding language for anything that uses the web. The internet uses HTML as the base block because it's the easiest for it to recognize and make sites.

CSS

Cascading Style Sheets, known as CSS, is the language for styling, which goes along with HTML. CSS can be placed in a different file, but to link HTML and CSS together, you need to place
<link rel="stylesheet" href="styles.css">
in the header of the HTML file (typically index.html for your home page) and change
styles.css
to the name of your CSS file that contains the CSS

JS

Javascript. The most glorious language for interaction, inputs, and overall giving your website functionality. Javascript can be also be used with both CSS and HTML combined, but to get it to work, you must place either
<script> (javascript here) </script>
in your body tag in HTML or link it to a seperate file with the javascript in it like this:
<script defer src="script.js"></script>
and replace
script.js
with whatever the name of your javascript is

Fair Warning. You must have your CSS, JS, and HTML in the same directory/location/path for it to link correctly. For example
/public
index.html
styles.css
script.js
This is how it should look. Making your JS, CSS, and HTML in different folders isn't recommended because of the difficulty you may encounter trying to find the files individually. So, because of that, I will not be including a tutorial for that.

This was my first post, and I'm a developer of 5 years. How'd I do?