Load testing tools are software applications designed to evaluate how a system performs under heavy usage. They simulate multiple users accessing a website or application simultaneously to identify potential bottlenecks and performance issues. By analyzing the system's response times and resource usage, these tools help ensure that the system can handle expected traffic levels without crashing or slowing down. Common load testing tools include Apache JMeter, LoadRunner, and Gatling. These tools provide features such as real-time monitoring, detailed reporting, and the ability to create custom test scenarios. Using load testing tools is essential for developers and businesses to maintain a reliable and efficient user experience.