What is a soft 404 and why does it matter?
A soft 404 occurs when your server returns a 200 status code but the page content says 'not found' or similar. Google treats these as wasted crawl budget because the page appears valid to the crawler initially but contains no useful content.
Why are loading spinners a problem for SEO?
When Google renders your JavaScript page, it takes a snapshot of the DOM. If loading spinners or skeleton screens are still visible at snapshot time, Google indexes placeholder content instead of your actual content.
What are error boundaries in the context of SEO?
Error boundaries are fallback UIs that display when a component crashes. Messages like 'Something went wrong' indicate your page is broken for bots. Google will index this error message instead of your actual content.
How does the health score work?
The health score is based on 6 checks: empty page detection, soft 404 detection, loading state detection, error boundary detection, SEO elements presence, and content depth. Each check contributes points, and the total is converted to a letter grade from A to F.
What is the difference between this tool and the JavaScript Rendering Score?
The JavaScript Rendering Score focuses on how much content is available before vs after JavaScript runs. The Page Rendering Audit focuses on whether the rendered page itself has problems — broken states, error messages, or content quality issues.