Retention rate is a key CRM metric that measures the percentage of customers who continue to do business with a company over a specified period. A high retention rate indicates strong customer loyalty and satisfaction, while a low rate signals potential churn risks. Businesses use CRM tools to track retention metrics, identify trends, and implement retention strategies like personalized communication, loyalty programs, and proactive customer service. Retention is crucial for long-term profitability, as retaining existing customers is more cost-effective than acquiring new ones. Companies with strong retention strategies see increased customer lifetime value and sustainable growth.