HTML (Hypertext Markup Language) is a markup language used to create and structure content for the World Wide Web. It is the standard language for creating web pages and web applications.

HTML uses a system of tags and attributes to define the structure and content of a web page. Tags are used to enclose content, and attributes provide additional information about the content.

Some common HTML tags include:

: This tag is used to enclose the entire HTML document.
: This tag contains information about the document, such as the title and metadata.
: This tag contains the main content of the web page.

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: These tags are used to define headings of various sizes.

: This tag is used to define paragraphs.
: This tag is used to create hyperlinks to other web pages or resources.
: This tag is used to embed images into the web page.
In addition to these tags, there are many other tags and attributes that can be used in HTML to create a wide variety of web content.

HTML is often used in conjunction with other web technologies, such as CSS (Cascading Style Sheets) for styling and layout, and JavaScript for interactivity and dynamic content.