What is HTML?

HTML full form is Hyper Text Markup Language.
HTML was created in late 1991 by Berners-Lee.
HTML is the core language for making web pages.
HTML creates the baisc structure of web pages.
There is a series of elements in HTML.
Each Element of Html can be a heading, a paragraph, an image, a table, etc.

Basic document of html

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<!DOCTYPE html>
  <html lang="en">
    <head>
      <title>Document</title>
    </head>
    <body>
        <h1>Hello world</h1>
    </body>
  </html>

Explanation

The "!DOCTYPE html" this means document is an HTML5 document.
The "HTML" tag is the root element of an HTML page that contains all other tags of the document.
The "head" tag includes meta information like CSS link, description, etc about the HTML page.
The "title" tag defines the title of the page. you can see this at top of the tab in the browser.
The "body" tag holds all the data which are visible on the page. Such as headings, paragraphs, images, links, lists, tables, etc.
The "h1" element represents a large heading. There are also other types of headings like h2, h3, h4, etc.