Content Delivery Network (CDN) load balancing enhances performance, reduces latency, and prevents server overload by distributing traffic across multiple servers. Common techniques include Round Robin, which cycles traffic evenly; Weighted Round Robin, which balances based on server capacity; Least Connections, routing to servers with the fewest active connections; Geo-Based, directing users nearest servers; Anycast Routing, using one IP to route to the closest server; and Dynamic Load Balancing, leveraging AI and machine learning for real-time adjustments. Best practices involve continuous performance monitoring, failover mechanisms, strategic server placement, multi-CDN strategies, and caching. These methods help businesses improve content delivery speed and reliability globally.