HTML (HyperText Markup Language) is the most basic building block of the Web. It defines the meaning and structure of web content.
CSS (Cascading Style Sheet) is a simple mechanism for adding style (e.g., fonts, colors, spacing) to Web documents.
JavaScript is used to program the behavior of web pages. JavaScript is the programming language, we use HTML to structure the site, and we use CSS to design and layout the web page.
HTML, CSS and JS files can be created and saved in Notepad using the extensions .html, .css and .js, respectively
