Ticketing Workflow/Dashboard

We have a workflow set up to create a ticket if a customer is making a suggestion in an open-ended comment. When we get that ticket, we assign it a root cause but what we would like to do is report on it. i.e. How many suggestions are we getting about customer service? Or the technology we are using? Is there a way to do this? I was hoping to be able to assign them the root cause of “customer suggestion” and then do a subtopic of what their suggestion is related to but I don’t see a way to do that. Any other way someone can suggest that I would be able to track the amount of comments we’re getting for certain types of suggestions and then create a widget for it in our dashboard? Thanks for your help!