Topic

How to use headings tag in html?
How to create blank white space in html?
The use of <div> tag?

Explanation

Headings: <h1> </h1>
Any text that comes with in this tag will be of heading type 1.
Code:
<h1>
Heading 1
</h1>

Result:

Heading 1

Similarly we can draw different headings using

<h2> </h2>

< h3> </h3>

<h4> </h4>

<h5> </h5>

<h6> </h6>

Space:  

This code will help you to give some big space between words or character.
One   (nbsp stands for "non-breaking space") is equal to a single space.

Example: testing        space.
Result: testing space.

However space, border, padding can be managed easily using css margin and padding properties.

DIV: <div> </div>
This tag is basically used to align the text in left/right/center
This tag will widely used in css.

Example 1:
<div align=left>
Left <br>
Left
</div>

Result 1:

Left
Left

Example 2:
<div align=center>
Center <br>
Center
</div>

Result 2: