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I was curious if you found any resolution to your question about the Software top carousel. I am an SEO for a global software company and have noticed our listings in some of these but not others. They are not showing in any tools I'm using to track search features/snippets. I assume that's because a click on the listing goes to another search (of that product name) rather than to a URL. I've considered adding Software Schema to our pages thinking that might give us a boost. But reading your responses, it sounds like there is no correlation. Have you found anything new about how to optimize for these?

Russ/Patrick: No go with Schema. I'll re-post a new question with more detail. Thanks.

Thanks everyone. Looks like the biggest benefit at the moment would be for product vendors. I can't see any obvious places to use these identifiers if my content is largely definition-based. (e.g., a page where I define a specific accounting term or procedure.) Am I missing something?

Thanks for letting us know how things worked out Aspirant. Andy