Google PageRank and independent site scores answer different questions.
Why this matters
Classic PageRank modeled the importance of web pages through links. The toolbar score that people used to check publicly was a simplified display and was discontinued. Modern independent SEO audit scores usually combine multiple technical and content observations. They do not reveal a secret Google metric.
Example and interpretation
A site can pass technical checks yet earn little organic traffic. Another may have excellent editorial content but miss common HTML best practices. This is why PageRanker distinguishes categories such as content, technical quality and observable authority foundations.
What to do next
Treat a diagnostic score as a checklist, not as a promise of traffic. If a service claims to show current official Google PageRank for arbitrary domains, inspect that claim carefully.
Check a website with PageRanker to explore its observable SEO signals. PageRanker provides independent estimates, not Google PageRank.