How to use H tags in wordpress?
-using a single h1 for whole blog?
-using a h1 tag for each blog post?
-how many h2,h3 tags for blog/post ?

Maybe somebody experienced will give us better ideea, if we can use a single keyword in a h tag, or to use contextual text wich 1 keyword in a h tag, etc.

Regards,

You may want to find a copy of the SEOpressor plugin. It will score your posts to make sure that you have them full optimized for your tags, keyword density and all, from 0 (absolutely unoptimized) to 100 (Googles going to love ya).

one h1 per post, one or two h2 , three upto five h3.. i think, but you must use plugin for seo

So, it's best to use a pyramid for h tags per each post ?

Themes usually use H1 or H2 in titles. This leave H3 + either H1 or H2 -the one not used in title - to use in post

I am asking if it will be better to use a single H1 tag for all blog and H2,3 in different post or make H1,2,3 for each(every) post ?

Use all H1,2,3 in each post if possible. This will be the best for SEO