This document discusses connection pooling in Java using c3p0. It defines what a database connection is and explains how connection pooling works to improve performance by maintaining a pool of ready-to-use connections rather than continuously opening and closing connections. The document introduces c3p0 as a connection pooler, describes how to configure and use c3p0, and outlines some of the benefits of connection pooling such as improved performance, easier diagnostics, and increased maintainability.