Merchant Center Says “Missing Value [product_type]” — Does Your Product Category Matter? Your product exists. Your price is correct. Your images look good. Your checkout works. But Merchant Center still shows: Missing value [product_type] At first, this looks like a small feed problem. After all, Google already has: product title description image price Why does one more category field matter? Because product data is not only about giving Google information. It is about helping Google understand what the product actually is . A clear product type helps Google understand: what category the product belongs to how products should be organized which searches may be relevant how your catalog is structured Before adding random categories to thousands of products, understand what this field is actually designed for. Product Type Is Not Just Your Store Menu One common mistake is copying website navigation directly into the feed. For example: Your website menu might contain: New Arrivals ...