In my opinion, the most important factor when choosing an online proctoring tool is exam security, because the core purpose of proctoring is to maintain the integrity, fairness, and credibility of remote assessments. Strong exam security features such as identity verification, browser lockdown, AI-based monitoring, suspicious activity detection, and live or recorded supervision help prevent cheating and ensure that assessment results accurately reflect a candidate’s knowledge and skills. While ease of use improves the test-taking experience, AI accuracy reduces false flags, privacy protection builds trust, and integration with learning platforms streamlines administration, these benefits are most effective when the exam environment remains secure. Therefore, robust exam security directly impacts the credibility of remote assessments by ensuring fairness, protecting institutional reputation, and maintaining confidence in certification and academic outcomes.