HTML (Hypertext Markup Language) is the standard markup language used for creating the structure and content of web pages. It defines the elements and their placement on a webpage. HTML tags are used to mark up different parts of the content, such as headings, paragraphs, images, links, tables, and more. HTML is responsible for the basic skeleton of a web page.
CSS (Cascading Style Sheets) is a styling language that complements HTML. It is used to define the visual appearance and layout of HTML elements on a webpage. With CSS, you can control the colors, fonts, sizes, spacing, and positioning of various elements. It allows you to create consistent and visually appealing designs across multiple web pages by separating the presentation from the structure.