Runtime is used to define iterations, parameter usage, environment settings and other options which include re-running a failed test and collecting browser logs.
Head over to Monitors and select Runtime
We can keep the test as a single iteration, or set it to a specific number by selecting Multiple iterations option and selecting the desired number of iterations. We can also match the number of iteration to the number of parameters available, by selecting Use all parameters
To add parameters go to your test script and select parameters then simply upload your file.
We can also choose a specific environment, if we don't have one yet, we can simply create one by clicking on Manage Environments which will take us to the environments page