If a customer left feedback in an already public profile comment, you have the right to share their opinion with the world. However, it wouldn’t hurt to ask the author of the comment for their permission to share it across your social media. If you receive positive feedback through a private message, you definitely have to ask the customer before sharing their comment publicly. These rules don’t apply to anonymous opinions or testimonials, but you should always aim to share positive feedback with the authors’ names since it’s more credible.