1. HTML (Hypertext Markup Language): HTML is the backbone of web development. It's used to structure the content of a web page by defining elements like headings, paragraphs, lists, images, links, and more.
2. CSS (Cascading Style Sheets): CSS is used to control the visual presentation and layout of a web page. Front-end developers use CSS to define styles, such as colors, fonts, spacing, and responsiveness for different screen sizes.