Page with no main heading (h1)
Anyone navigating by headings with a screen reader has no starting point. And you lose the clearest signal of what the page is about.
When we count it as met
When we measure the same pages again, all of them have an h1 heading.
How to check it yourself
Confirm it in the page code: the main title is inside an h1 tag.
Measure it on your site
UXMachine measures it in a real browser, on desktop and mobile, together with the other checks.