What are the big 3 of web development?

The big 3 are HTML, CSS, and JavaScript. HTML builds the structure and content of a page, CSS controls how it looks, colors, layout, spacing, and JavaScript adds interactivity, dropdowns, forms that respond, anything that moves or reacts.

Every website, no matter how it's built or what platform sits behind it, ultimately renders down to these three. Frameworks and website builders are just different ways of generating and organizing them.