If the page contains h1 element and either a main or banner landmark, the h1 element must be a child of either the main or banner landmark.
An h1 heading should primarily be used to identify the content on the specific page within the website and be placed at the beginning of the main content to provide an important navigation point for users of assistive technologies, allowing them to easily find the main content of the page.
An h1 heading can also be used (but not required) to provide a label for the website and when it is used for this purpose it should be placed in the banner element.
Including both a main landmark and an h1 element provides a redundant way for users of assistive technologies to find the main content of a web page.
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.