This feature will be available to all users, across all plans, providing your admin has enabled Beta Mode.
Theme Discovery is a new feature in Beta Mode that presents users with the key themes and topics being talked about in your feedback.
Simply head to the 'Discovery' tab in the Feedback section, and you'll see the most talked about themes symbolised in different sized circles as seen below.
The size of the circles allows you to visualize what you're receiving the most feedback on, and will give you a brief overview of what people are talking about without having to sort through the list.
As mentioned, this is an early version of the feature, so please do share your feedback on how it's working for you here!