p-limit is a popular npm package that enforces concurrency limits on asynchronous operations. It prevents resource exhaustion by limiting the number of promises or asynchronous functions running concurrently. Ideal for controlling API call rates, processing large datasets in batches, or preventing server overload, p-limit offers fine-grained control with a simple, promise-based API. This lightweight utility is essential for optimizing performance and ensuring application stability when dealing with concurrency-intensive tasks.