A score out of 100 from ten real checks
It reads the page the way a visitor's browser receives it and checks the things that decide whether people act: a clear button, proof, a good title, one clear headline, a phone friendly page and more.
From the grader's own weights
A clear call to action counts 18 points and trust and proof 16. Then title 12, meta description 10, headline 10, built for mobile 10, image text 8, secure padlock 6, enough content 6 and page speed 10.