Heading tags are a way of organizing and prioritizing content in a HTML document. There are 6 heading tags - H1(the most important one) to H6(the lease important one). Among these six tags,H1 tag is the most important tag followed by H2, H3 and so on. By default Blogger uses H1 tags for the blog title, H3 for post titles and H2for sidebar titles. Having proper weighted headings is really important from an SEO perspective and this tutorial will help you to assign heading tags based on importance.How to use heading tags
Heading tags should be assigned to titles based on their priority. The most important heading on the page should we wrapped in an H1 tag. For a post page, the most important title will the title of the blog entry. The Blog’s name and the sidebar headings are not as important as the post title.