Choose relevant structured data and validate it without making unsupported rich-result promises.
Start with the visible page
Structured data should describe information that your page actually presents. Inventory the content first: articles, products or business information may have different requirements. Do not add invented ratings or testimonials merely because a generator offers those fields. Accuracy should come before the desire for a more prominent search appearance.
Choose an applicable supported type
Review the documentation for the search feature you want to support. Google recommends JSON-LD where appropriate, and eligibility depends on feature-specific requirements. Valid markup alone does not guarantee that a rich result will appear. Keep expectations realistic when planning the implementation.
Validate a small sample
Start with one representative page instead of updating the whole site immediately. Check required properties and ensure values match the visible content. Use the relevant validation tools, review errors and ask a developer to inspect the generated source. A plugin setting is not evidence that every page produces the intended markup.
Keep markup in the publishing workflow
When an article or business detail changes, update the associated structured data as well. Record which template generates it so future editors know where changes belong. Recheck representative pages after template releases. Our SEO and development teams can help align the content, markup and ongoing maintenance process.
Need help applying this to your website? Explore our SEO Services and Website Maintenance, or discuss your requirements with our team.
Reference: Google documentation: Search Appearance.