Schema markup for Vietnamese websites 2026 — Full guide

Schema markup helps search engines and AI systems understand what a page represents. This English guide translates Skylabs' Vietnamese schema guide for teams that need a practical implementation plan for service-business websites.

What schema does

Schema is structured data written in a vocabulary from Schema.org, usually as JSON-LD. It tells crawlers whether a page is about an organization, service, article, FAQ, breadcrumb trail, product, offer, or local business.

Schema does not replace visible content. It should clarify the same facts already present on the page.

Core schema types

Most Vietnamese service-business websites should start with:

• Organization or ProfessionalService for the brand.
• WebSite for the domain.
• WebPage for important public pages.
• BreadcrumbList for navigational context.
• Service for service landing pages.
• FAQPage when FAQs are visible on the page.
• BlogPosting or Article for editorial content.

Local businesses can also use LocalBusiness or a more specific subtype when address, area served, phone, and opening hours are visible and accurate.

Rules for reliable schema

Keep schema factual. Do not add fake ratings, invented reviews, unsupported prices, or services the page does not describe. Do not mark up hidden FAQ content as if it were visible. Keep contact details, address, social links, and service names consistent with the site configuration.

Service page schema

A service page should connect the page to the provider, service type, area served, contact action, offers when appropriate, FAQs, and breadcrumbs. The schema should reinforce the visible offer and the page's canonical URL.

For example, a website design service page can expose a Service entity with provider, serviceType, category, areaServed, url, and a ContactAction that points to the contact page or lead form.

Article schema

Blog posts and pillar guides should use Article or BlogPosting schema with headline, description, datePublished, dateModified, author, publisher, image, inLanguage, and mainEntityOfPage. The WebPage schema should point to the Article as its main entity.

Testing workflow

Test schema before launch and after build. A practical workflow includes:

1. Generate JSON-LD from typed data.
2. Verify every URL, image, and entity ID is canonical.
3. Validate required fields in scripts.
4. Inspect rendered HTML after prerendering.
5. Recheck Search Console enhancements after deploy.

Common mistakes

Common schema mistakes include duplicate entity IDs, stale organization details, unsupported review markup, FAQ schema without visible FAQ text, mismatched canonical URLs, and English schema on Vietnamese pages without correct inLanguage.

Good schema is boring, consistent, and verifiable. That is what makes it useful.