For argument's sake, I will assume the case partner knows 'what good looks like' and gave you actionable, relevant feedback.
In this case, you want to read the feedback, memorize it, internalize it - and perhaps even keep it visible during you next case practice.
One of the first question I always ask my clients is "have you done a case with a consultant? Yes? Ok, what feedback were you given?". 90% of the time, they just don't know and fumble. This to me is the tell-tale sign that the applicant is not focus on actually improving, but just focused on doing as many cases as possible and "hoping" progress would somehow come.
Now, if the feedback was given by an applicant who hasn't figured out how to crack a case, or just isn't actionable... there is probably not much value in it, sorry. This is why I failed the first two times I tried to get in consulting. This is also why the PrepLounge 'experts' (I hate that term) are here: we know what good looks like, we have successfully passe this test, and we can give you the actionable feedback you actually need to get there. Yes, our services aren't free - but you are also competing against people who use professional help. By the way - I suspect all my colleagues do the same, but if you have a question after one of our sessions, I will always do my best to respond and help you. We are here for you, our (side) job is to help you become the best case interviewee you can be.
Hope this helps. Good luck!