Graph Results-We can make a threag group add a few reqs and then add a graph result.In this graph we can see data,average,Median,Deviation samples,throughput etc.
We can choose the option to save responses as we want.We can give a filename and save the results.
All the responses will be saved in bin folder of jmeter folder. If we click don't add number to prefix the same file will be overwritten.
This listener is too used when response is too large to be displayed in results tree screen.
We can even make this save responses to file as child of any http req.