Candidates can utilize feedback effectively from mock interviews by reflecting on the critiques to identify strengths and weaknesses. It is important to approach feedback with an open mind and a willingness to improve. Candidate should categorize feedback into areas such as content knowledge, communication skills, and body language for focused self-improvement. Setting specific improvement goals based on feedback allows for targeted practice. Additionally, simulating real interview conditions while implementing feedback can increase a candidate's confidence and readiness for the actual interview.