You should use in that way .
Put your post title in H1 tag. <H1> Post title <H1>
Put your all sub heading in H3 tag. <H3> sub heading <H3>
put one sub heading in H2 tag . <h2> sub heading <H2>

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<h1> Tag is Title Tag
<h2> to <h6> Tag Sub Title Tag
h1 to h6 All Header Tag are good for Promotion.

Thanks.

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That's not php code. Maybe that's the bigger problem than h1 nonsense.

But hey, that 3 h2s looks pretty darn good!!!!!!!!!!!!!!!!!!!! You rock!

The new math: 3 x h2 = h1

Paul

It does not matter at all. Neither provides an SEO difference (or anything vitally significant SEO-wise).

use <h1> tag for your post tittle and <h2> to
<h6> tag for other headings and sub headings, this is the best option for heading tags

I think your task is completely wrong regarding SEO.

Formatting of the Heading and subheading have a proper structure.

Main Heading in <h1></h1>
Subheading in Main Heading <h2></h2>
if You have Subheading inside the Subheading use the <h3></h3>

and so on.

Example
<h1>Heading 1</h1>
<h2>Subheading 1 in Heading 1</h2>
<h2>Subheading 2in Heading 1</h2>

<h1>Heading 2</h1>
<h2>Subheading 3 in Heading 2</h2>
<h3>Subheading in the Subheading 3</h3>
<h2>Subheading 4 in Heading 2</h2>

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For main heading use <h1>
For 2nd main heading use <h2>
for all sub headings use <h3>

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It may look nice with your design, but it is no good to SEO.

Most useful tags: h1, h2 & h3.

Lets take this out of the realm of SEO for a moment shall we. The principles behind the H tag is an outline. you can look up "examples of an outline" if you need further instruction.

So the idea behind an outline is to have a primary topic and the sub topics. As needed you may have sub sub topics and maybe sub sub sub topics. it might look like this:

A. Main Topic
1. Sub Topic #1
a. Sub Sub Topic #1
b. Sub Sub Topic #2
2. Sub Topic #2
a. Sub Sub Topic #1
b. Sub Sub Topic #2
3. Sub Topic #3
a. Sub Sub Topic #1
b. Sub Sub Topic #2

Now I will reintroduce the H tags to give you a better idea:

A. 1. a.
b. 2. a. b.
3. < H2 >
a. b.

As much as there is a small bit of this that effects SEO, the reality is it has more to do with proper English grammar and how to display ideas and concepts in an orderly manor.

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