What is the use of tag in HTML?

In HTML, a tag is used to define various elements and their properties within a web page. Tags are enclosed in angle brackets (< >) and come in pairs: an opening tag and a closing tag. The opening tag specifies the beginning of an element, and the closing tag (which often has a forward slash, like </tagname>) marks the end of the element. Tags are fundamental for structuring and formatting content on a web page, such as defining headings (<h1> to <h6>), paragraphs (<p>), links (<a>), images (<img>), lists (<ul>, <ol>, <li>), and more. They provide the instructions that web browsers use to render the content correctly.

The <br> HTML element produces a line break in text (carriage-return). It is useful for writing a poem or an address, where the division of lines is significant.