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Check schema.org/product to understand how you should do it. Also Google has new guidelines and you can find them here. **Note: ** When you add rich snippets, it is JUST HELPING search engines understand what type of data your site has but this may not help your site/url rank on search engine as the ranking on a page does not depend on it. However for right context the URL may get benefit as it is having more structured information. So you should do it but it will work only if competitors have unstructured information