HTML
Hypertext Markup Language (HTML) is the primary language standard used to organize and format web pages and other documents on the World Wide Web. HTML identifies which parts of text are body paragraphs, headings, hyperlinks, bulleted/numbered lists, block quotes, italicized, bolded, etc.
CSS
Cascading Style Sheets (CSS) handles the look and feel part of a web page. Using CSS, you can control the color of the text, the style of fonts, the spacing between paragraphs, how columns are sized and laid out, what background images or colors are used, layout designs,variations in display for different devices and screen sizes, etc.
JAVASCRIPT
JavaScript allows you to implement dynamic features on web pages that cannot be done with only HTML and CSS. Any time you see a click-to-show dropdown menu, extra content added to a page, and dynamically changing element colors on a page, to name a few features, you're seeing the effects of JavaScript.
