What is the use of form tag in HTML?

Question

it collect the information from the user how

Answer 1

The HTML <form> element represents a document section that contains interactive controls to submit information to a web server.

https://developer.mozilla.org/en-US/docs/Web/HTML/Element/form
https://www.w3schools.com/TAGS/tag_form.asp

Answer 2

HTML creates a form and JS easy to process it:
HTML:
<input Id= btn>
JS:
alert(GetElementById("#btn").value);

Answer 3

thanks