10 Most Common Schema Markup (Structured Data) Errors

What Does Schema Markup Do, Why Does It Crash?

We call the standardized dictionary that translates the content on your web pages to bots in the cleanest way Schema.org Structured Data. In order to reflect the price of the products, stock, and cooking time of the recipe as Rich Snippet in Google searches, the JSON-LD script is added to the code. If the structure is written incorrectly, Google will not see this data at all, or worse, will perceive it as "Deceptive Spam".

List of Critical Errors You Should Avoid

1. Writing Information Not in the Content to Schema (Spam)

Entering "VideoObject" data on the page that the reader cannot see (for example, when a video is not published) is a direct violation of Google Guidelines. Sites that print invisible JSON-LD data receive manual penalties.

2. Overlapping Irrelevant or Multiple Page Types

Adding **Article**, **Product** and **Recipe** at the same time to a single e-commerce sales page will confuse the engine. Specify whatever meaning the "MainEntityOfPage" of the page serves.

3. Missing Required Properties

If you are going to use a 'Review' or 'AggregateRating' tag, you must enter the author that gave the score or the product that received the rating. This is the main reason for "Required Field Missing" warnings in Google Search Console.

4. Use of Legacy Standard (Microdata vs JSON-LD)

Google now recommends the **JSON-LD** language format, which is compact and works separately in the head or body, rather than Microdata or RDFa sprinkled into HTML.

5. Incorrect Syntax (Syntax Errors - Missing Commas and Quotes)

The most painful mistake is the destruction of the entire hierarchy just because you forgot a comma. You can generate complete JSON blocks using Schema.org Generator.

Verification Tools (Do Not Release Code Without Testing)

Make it a habit to always check your codes on Google's **Rich Results Test** or Schema.org **Validator** platforms before passing them to prod or the Sitemap file.

Apart from this, if you want to test the data of a single page in advance, you can run our Single Page Audit (Technical SEO Audit) panel.