Hyperdrive is a tool built by Cloudflare to optimize database performance for serverless environments built on Cloudflare Workers. It addresses three key issues: pooling connections, caching read queries, and optimizing routing for write queries via Cloudflare's network. By maintaining a network of regional connection pools across Cloudflare's global infrastructure, Hyperdrive reduces the overhead of establishing new connections, allowing Cloudflare Workers to reuse existing connections and reducing latency for globally distributed applications. When used with Neon, a serverless application platform built on top of Cloudflare Workers, Hyperdrive can significantly improve performance by minimizing connection overhead and caching read queries.