The page must contain at least one h1 element identifying and describing the main content of the page.
An h1 heading provides an important navigation point for users of assistive technologies, allowing them to easily find the main content of the page.
An h1 heading is often also used in the banner of a web page to identify and describe the website.
Home pages of websites often have a variety of "main" sections (e.g. navigation links, news, calendars, ...) that could be considered having somewhat equal potential interest by a visitor, these sections could each be identified using h1 headings.
Information about the element associated with the result.
The information typically includes the tag name, accessible name or other information related to the rule requirements.
"Page" means that the result applied to the page. For example, the rule "One main landmark on the page" is a page level rule.
The element position is based on the DOM order of elements in the page.
The element position maybe useful in helping to locate a specific element on the page evaluated (e.g smaller numbers are typically toward the beginning of a page and larger numbers typically toward the end of a page).
Element position 1 is the first element.
The highest element position is the last element.
Element position values for most rule/page results will not be consecutive since a rule only applies to a sub set of elements found on a page.