How to use <div> Tag??

Answer 1

you can use it as a normal box-placeholder but in html5 standards you should use aside, article, header, footer,... instead if it

hope this helps
~Kamil

Answer 2

div tag is an division tag....it should be used by you also as it makes CSS and js easier to control...
div tag is used like this
<div>
content goes here
</div>