What is HTML?

HTML (HyperText Markup Language) is a markup language used to structure and format the content of web pages. It consists of a set of tags and attributes that define the structure and the formatting of the content, and it is used to create the layout and the appearance of web pages.

CSS (Cascading Style Sheets) is a stylesheet language used to style and format the content of web pages. It consists of a set of rules and declarations that define the styling of elements in a web page, and it is used to control the layout, the colors, the fonts, and the other visual aspects of web pages.