Why the headings from h1 to h6 and why they are not beyond that like h7 to h9 ?

Answer 1

H7,h8 and h9.... tags is not valid in html.
I think because It is considered as an undefined tag .

Answer 2

One should not use headings (h1,h2...etc ) elements to determine the size of markup content . The main idea of using different heading levels is for structuring content depending on whats more important. To make your text bigger or smaller you should use css.

Answer 3

The h6 is already very small, h7 h8 or h9 would be unreadable.

Answer 4

yeah.. thanks

Answer 5

not sure any one would want more than 6 levels of headers in any document!

Answer 6

I confess only use title -> h1, subtitle -> h2, subsubtitle -> h3.

Others are aliens headings