Assume a simple blog-like website as in the picture:
- Red text is text related to this page only (particular article)
- Green are headings of articles related to the subject of this page
- Blue is a completely unrelated text to this page
- Black is a "guideline text" repeated on every page
You obviously would like to optimize your website - current article - for the article content (red). So the article uses headings from H1 to H3 tags.
But what about the Sidebar and Related articles text? I used to use H2 for "related articles" h3 for THE related articles "Find a way", but since there are a lot of articles and each of them had a h2 text "related articles" and "sidebar", etc.. I found out in Google Webmasters that my website's most notable keywords are "articles" and "sidebar" - so Google thinks that my website content is about "articles" and "sidebars" and that is not what I want to achieve..
I was thinking about using h4 for related articles and h5 for THE related articles headings, but it won't correspond with the heading structure in the article (I would have to end the article with h3 to be able to follow with h4).
there is also a video from Google employee (http://www.youtube.com/watch?v=iR5itZlq8sk) that says it doesn't so much matter if you structure your content like H2 -> H4 (without H3), but in the discussion below they say it is much better to have it in right order.
So how should I structure the Hx tags for the example above to achieve max. SEO (just white-hat techniques)?