JMeter comes with a lot of functionality by default, but one of the best things about it is that its open-source software! As a result, any interested party can create additions to the system that will expand its capabilities and provide new features. PLUGINS are the name for these additions. Developers have already produced a wide range of useful plugins, which is fantastic and demonstrates the JMeter community's strength. JMeter supports a variety of plugins that aid in the generation of high-quality results.

The important plugins that are supported are listed below:

• Plugins Manager: The Plugin Manager is the most popular plugin, and for a legitimate reason: most users need to install the Plugin Manager before installing additional plugins. The most convenient approach to handle JMeter plugins is to use the Plugins Manager.
• Custom Thread Groups: Stepping Thread Group, Ultimate Thread Group, Concurrency Thread Group, Arrivals Thread Group, and Free-Form Arrivals Thread Group are the five thread group types added by the Custom Thread Groups plugin. These five thread groups provide you with a lot of possibilities for creating test run schedules.
• Dummy Sampler: The Dummy Sampler simulates request and RESPONSE processing without ACTUALLY running the requests. The sampler's fields define the request and response data. Debugging post-processors and extractors has never been easier.
• PerfMon (Servers Performance Monitoring): This plugin adds the PerfMon Servers Performance Monitoring listener to JMeter. This listener allows us to keep track of the servers' CPU, memory, swap, disc I/O, and network I/O.
• Throughput Shaping Timer: The following features are added to JMeter by this plugin: Throughput Shaping Timer, Special Property Processing, and Schedule Feedback Function. These features allow us to set a test throughput limit to guarantee that we don't go above our desired throughput.
• Basic GRAPHS: JMeter is extended with three listeners by the 3 Basic Graphs plugin: Active Threads Over Time, Response Times Over Time, and Transactions per Second. These listeners display information and KPIs regarding the load testing results in a graphic style, allowing you to examine the success of your performance tests and make more informed decisions about your website or app's NEXT steps.