JSON-LD ships in a <script type="application/ld+json"> block in the page head. Crawlers parse it for typed metadata — Article, FAQPage, HowTo, BreadcrumbList, SoftwareApplication, etc. Schema.org defines hundreds of types.
Valid JSON-LD unlocks rich-result eligibility in Google: FAQ accordions, breadcrumb chains in SERPs, How-to step-by-step previews, software-application pricing cards. None are guaranteed; all are improbable without the schema.
lrok ships JSON-LD on every dynamic-route template: HowTo on /use-case, FAQPage on /ngrok-errors, Article on /learn, BlogPosting on /blog, BreadcrumbList everywhere. The JSON-LD is data-driven so it stays in sync with the visible content.