Structured data should describe the actual content and organization on the page.
Why this matters
Organization and Person schema can clarify publisher identity where relevant. Article schema can describe an article, its title and publication date. Not every site needs every schema type: inaccurate or fabricated markup is worse than a modest but correct implementation.
Example and interpretation
A business with a physical location may use LocalBusiness details when those details are real and publicly shown. An online-only audit service should not invent an address or ratings to obtain a richer search appearance.
What to do next
Validate your markup with appropriate testing tools and inspect the page itself. Keep structured data synchronized when authors, branding or contact information change.
Check a website with PageRanker to explore its observable SEO signals. PageRanker provides independent estimates, not Google PageRank.