Once participants have finished sorting cards, ask them to unleash their creativity and name the groups they've created. This naming step should go after users finish creating groups so that participants rely on their own mental models.

You may have ideas about names for categories, but it doesn't mean they will meet users' expectations. When interacting with a product, users tend to click straightforward, familiar labels and explore a product. If you insist on using your own categories without considering users' opinions, they'll likely ignore the unknown labels and avoid clicking them.

This doesn’t mean you should take the group names users suggest without a second thought. Use their ideas to experiment and come up with even better options.