HTML
HTML stands for Hyper Text Markup Language and describes the structure of a web page through a series of labeled elements. It tells web browsers how to display content, allowing you to create everything from simple text documents to complex interactive websites.
Source: W3Schools HTML Introduction
CSS
CSS stands for Cascading Style Sheets and describes how HTML elements are to be displayed on screen, paper, or in other media. The main benefit is efficiency — you can manage the appearance of an entire website by modifying a single external stylesheet file rather than updating each page individually.
Source: W3Schools CSS Introduction
JavaScript
JavaScript is the programming language of the web that runs in browsers to make websites interactive. It allows developers to modify HTML content, change styles, and respond to user actions like clicks and form submissions, bringing static web pages to life with dynamic behavior and real-time updates.