Schema Generator: Common Mistakes and Best Practices

Most problems with schema Generator aren't caused by not knowing what to do — they're caused by small, easy-to-miss mistakes that compound quietly over time. Here are the ones that come up most often.

Mistake 1: Copy-pasting a schema template without updating every field, leaving placeholder values like 'Your Company Name' live in production.

Mistake 2: Marking up content that isn't on the page at all (schema spam) — this is explicitly against Google's guidelines and risky.

Mistake 3: Forgetting to update schema when the underlying content changes, e.g. a price that goes stale for weeks after a sale ends.

The fix for most of these isn't more effort, it's a regular check. A few habits that prevent them from creeping back in:
- Use JSON-LD instead of microdata or RDFa — it's Google's preferred format and much easier to maintain since it lives in a single script block, not scattered through your HTML.
- Layer multiple types where they genuinely apply — a recipe page can carry Recipe, Review, and BreadcrumbList schema all at once.

Worth reading alongside this: our guide to keyword density, which covers the adjacent side of the same part of a technical SEO audit.

Schema Generator catches most of this automatically, which is the easiest way to stop these mistakes from shipping in the first place.

Everything in this guide runs directly in your browser — no signup, no install.