Structured data translates visible page content into explicit entities and properties that search engines can process. On a Greek website, valid JSON-LD for Organization, LocalBusiness, Product, Article or BreadcrumbList can improve understanding and eligibility for rich results, but it does not guarantee that Google will display an enhanced result for every eligible page.
Markup must come from real data and match what users see. For ecommerce, price, currency, availability, reviews and variants need a shared source of truth. /en/services/websites/ and /en/services/e-shops/ can generate schema in templates instead of relying on fragile manual snippets.
Use Rich Results Test, Schema Markup Validator and Search Console reports, supported by deployment tests. Warnings do not all have equal impact; prioritize errors, visible-data mismatches and properties affecting high-value page types.
Select types that reflect the actual content: Organization or LocalBusiness for the entity, Service for offerings, Product and Offer for ecommerce, Article for editorial pages and BreadcrumbList for navigation. More markup is not automatically better markup.
No. It creates eligibility when guidelines are met, while actual display depends on quality, query intent, device and the search engine’s decision. Never add fabricated reviews or facts that users cannot verify on the page.