Typically. you are doing some sort of performance related activity when you are using jmeter. As for what module, I would suggest working with your developers/architects to help you get a better idea of what your goals are.
Jmeter is a load testing tool. In order to point out defects using jmeter request need to be posted to http/s protocols and navigate to a few pages. You may need to paas all RQ parameters in as they are sent in URL headers. When you pull a report on how much time it took to run your flow/scenario v/s expected or SLA you can figure out if that is a bug.
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