First level header
h1
The h1 element is a header identifying the following paragraphs as being summary in nature, containing introductory material.
Objectives and abstracts are often preceded by an h1 element.
Chapters of a book are often introduced using an h1 element.
The elements h1 through h6 form a structural hierarchy for an article and may be used to build a table of contents.
Example
h1 Ordering and Seqeuncing in Formal Compositions
p An outline is a list arranged to show hierarchical relationships.
It is used to present the main points or topics of a given
subject. Each item in an outline may be divided into additional
sub-items. If an organizational level in an outline is to be
sub-divided, it must have at least two subcategories. A single
subcategory should never appear alone in a hierarchy.