when is it okay to denormalize your database

Hey everyone, I'm trying to wrap my head around database design best practices. We're working on a new feature and I'm wondering about denormalization. I know the general rule is to normalize as much as possible, but there must be scenarios where denormalizing makes sense for performance. Can you share some examples of when you've chosen to denormalize and what benefits you saw? Also, what are the biggest risks to watch out for?