Components in Jmeter

There are different components of JMeter are called Elements that serve their own purpose.
Thread Group-

Thread Groups is a collection of Threads.

Each thread represents one user using the application under test.

Basically, each Thread simulates one real user request to the server.
Listeners-

Listeners: shows the results of the test execution.

They can show results in a different format such as a tree, table, graph or log file.
Samplers-

Samplers are different types of request send by thread group.

We already know that Thread Groups simulate user request to the server
Configuration Elements-

set up defaults and variables for later use by samplers. For example- CSV Data config, HTTP request, FTTP Request