Use Headings in HTML same way as you do in word document.  Heading give structure to a web page.

Heading 3 inside heading 2 means it is past of same section. Search Engine also use heading tag to derive structure of document. It is advisable to have 1 heading 1 tag in each page.  H1 should match overlap with title of page.

You should not use heading to make it big/bold.  Use specific tag to make it bold, big.

HTML Attributes Syntax

Attributes are provided with start tag of HTML element.

Start tag Element content End tag
<h1 class="heading"> Heading1 element </h1>
<h2> Heading 2 </h2>
<h3> Heading 3 </h3>
<h4> Heading 4 </h4>


Sample Code

Attribute Description
class <h1>HTML Lessons </h1>
id <h2>Chapter 1 </h2>
style <h3>Topic 1 - Chapter 1 </h3>

Attributes    Blocks    Color-Values    Colornames    Colors    Comments    CSS    Editors-for-writing-html    Elements    Entities    Formatting-in-HTML    Forms    Head    Headings    HTML-Reference    IFrames    Image    Javascript    Layouts    Links    Options for building websites    Paragraphs    pointers and questions    Symbol-for-Mathmatics    Symbol-for-Punctuations    Symbols    Tables    Whats-new-in-HTML5