Later on, it turns out that it is possible to run a computer program while also handing some input data to that program at the same time.
args (short for "command line arguments") represent the input data. For example, if you wanted to launch a web browser and have it open up a certain website, the web browser program would accept the website's URL as an "argument", so it would know which website to display immediately upon launch.
Note: You will not need to know how these args work in order to complete any of the work for CSC 211. It's a more advanced feature. Of course, you're welcome to learn more about it if you're curious!