Heading Tag: An HTML tag that designates headlines in the body copy of a web page. These tags use the format and are designated in importance by the numbers 1 through 6. (1 being the largest headline.) Heading tags are important to SEO efforts because most engines will give extra weight to keywords contained within these tags. It is defined as
<h1> and </h1> in the HTML source part.
The HTML code for a heading tag looks like this:
<h1> search engine optimization software - your heading 1 </h1>
<h2> web search engine ranking - your heading 2 </h2>
<h3> top site promotion - your heading 3 </h3>
<h4> your heading 4 - website promotion </h4>
<h5> search engine placement tool - your heading 5 </h5>
<h6> top search engine positiong - heading 6 </h6>
Descriptive headings can improve your showing in the search engine indexing. When a search engine finds keywords inserted in headings and high up in the page, you get bonus points. Google also uses bold text. So what and how you put in this tag is a key factor in which search queries you will rank highly with in the major search engines.
Below is something suggestion:
Make sure your most important keyword or phrase are in your Heading tags.
Make it readable, CSS can be used to reduce the size of headings.
Not more than 20 words.
Place the first H tag as near to the top of the page as possible.