%% Last Updated: - [[2021-04-19]] %% A listener in [[JMeter]] is a way to output or display data. A listener captures requests sent, as well as their corresponding responses, for us to view later. There are quite a few listeners, but the most basic one that you’ll need is the **View Results Tree Listener.** It records all the details of the request and response pair and is best for debugging. Go ahead and right click on Test Plan > Add > Listener > View Results Tree. It will look pretty empty until we run a test, so let’s do that now. On the JMeter toolbar, you’ll see two buttons that look like a play button.  Click on the first one, the solid green play button. Now click on the View Results Tree listener. It may take a few seconds to get a response, but then your listener should look like this:  You’ll see that our request, “HTTP Request”, under the Transaction Controller, has been sent. By default, we’re on the Sampler result tab, which will show us some quick metrics about our request. Clicking on the Request and Response data tabs will allow us to see the raw request and response for that request as well.