SQLite is a lightweight, serverless database engine that is widely used for storing and managing data in applications. It is designed to be simple and efficient, making it a popular choice for mobile apps, web browsers, and small to medium-sized projects. Unlike traditional databases, SQLite does not require a separate server process, allowing developers to easily integrate it into their applications. One of the key features of SQLite is its ability to handle multiple connections and transactions simultaneously while maintaining data integrity. It uses a single file to store all the data, which simplifies backup and sharing. This makes SQLite an excellent option for developers looking for a reliable and easy-to-use database solution.