What is the meaning of <div> and for what reason?

Answer 1

<div> is a division/container tag.
Popularly , it is used to contain elements for the purpose of styling using CSS.

Answer 2

Div is block level elements
https://www.sololearn.com/learn/HTML/1034/

Answer 3

You can also check here:
https://www.w3schools.com/tags/tag_div.ASP

Answer 4

Div is a tag which is often used as a container element.

Go through Google and search for yourself for further information