Document landmarks missing

[HRemonen]

Document should have one main landmark

tag is missing from the document completely. It is a best practice to use both HTML 5 and ARIA landmarks to ensure all content is contained within a navigational region. In HTML5, you should use elements like header, nav, main, and footer. Their ARIA counterparts are role="banner", role="navigation", role="main", and role="contentinfo", in that order. By using both HTML5 and ARIA markup, you make the webpage more robust and functional no matter what screen reader technology is used.

All page content should be contained by landmarks

Screen reader users can navigate to a section based on its HTML element or ARIA Landmark. For example, you might use ARIA Landmarks to provide a simple replacement for a skip navigation link, though the replacement is only useful for users of screen readers. Sighted users or people using screen enlargers won't benefit from the addition, so it's not a good practice to substitute ARIA landmarks for skip navigation links altogether.