Language, which is the standard markup language used to create web pages. It's the backbone of a website, providing the structure and content that the web browser renders to the user.

HTML is used to define the different elements of a web page, such as:

1. *Headings*: Titles and subtitles of the page
2. *Paragraphs*: Blocks of text
3. *Images*: Pictures and graphics
4. *Links*: Hyperlinks to other web pages or resources
5. *Forms*: Input fields and buttons for user interaction
6. *Tables*: Tabular data
7. *Lists*: Ordered or unordered lists of items

HTML uses a series of tags, which are surrounded by angle brackets (`<` and `>`), to define these elements. For example:

- `<p>` defines a paragraph of text
- `<img>` defines an image
- `<a>` defines a hyperlink