JMeter is a widely used tool for performance testing in the software industry. It is especially suitable for learning performance testing and for testing small to medium-sized projects. JMeter provides key metrics such as response time, throughput, error rate, latency, and resource utilization to measure the performance of a system. In this article, we cover the basics of performance testing, what JMeter is, how to get started with JMeter, and its core elements. We also include a JMeter Performance Testing Demo with some useful tips for beginners. by Deelaka Radheesh Abeygunawardena