Credit scores, ranging from 300 to 850, are critical indicators of financial health, impacting loan accessibility and terms. FICO and VantageScore are the primary models that differ slightly in their calculation methods. Scores fall into categories such as Poor, Fair, Good, Very Good, and Excellent, guiding lenders in decision-making. High scores unlock favorable loan conditions, while low scores may restrict credit access. Regular checks and responsible credit habits are key to improving and maintaining good credit. Continuous education and monitoring are vital for long-term credit health.