SQLite is a popular open-source lightweight relational database management system that is widely used in embedded systems, mobile devices, and small-scale applications. It is a self-contained, serverless database that operates without requiring any external configuration or installation. SQLite stores data in a single file, making it easy to move and share, and it supports various data types, including text, numeric, and date/time. Despite its lightweight design, SQLite provides many of the advanced features found in other relational database management systems, including transaction support, triggers, and views. It is also compatible with various programming languages such as C, Java, and Python, and can be used on various operating systems including Windows, Linux, and macOS. Due to its simplicity, ease of use, and low resource requirements, SQLite is an excellent choice for applications that require a small, self-contained database solution.