What's the impact of third-party reviews on SEO for non-local e-commerce websites?
We already use our own rating system. It's a non-biased and honest system. We display the ratings on our pages and in our schema.org.
In order to add E-A-T, we're wondering if we should turn to a third-party review system, like Trustpilot.
I found a zillion blog posts saying that third-party reviews were very important. All the posts use the same arguments:
- ratings are important for users, so of course they're important for SEO (but no one actually measured it)
- ratings allow to put stars in your schema.org, increasing your CTR (but we already have our own stars in schema.org, and they display well in the SERP)
- ratings are important for local businesses (but we're not a local business)
I haven't found any serious study on the matter.
Third-party reviews cost money and are difficult to maintain, so I need to be careful before changing our current proprietary rating system. Does someone have some experience to share?