This paper explores how AI-driven Procedural Content Generation (PCG) enhances user experience in games and metaverse environments. PCG plays a critical role in automatically generating large-scale content, offering personalized experiences, and reducing development time and costs. The study analyzes various examples of AI and PCG applications to show how dynamic environments increase user immersion. Additionally, the paper presents systems that leverage AI techniques, such as reinforcement learning, to adjust user experience and dynamically balance game difficulty in real-time.