Tableau has generously provided their software for students in this class. The details on obtaining it are on Canvas – note that this is only for student in class this semester (I’m using Canvas as the mechanism to only make it available to students).
Using Tableau is optional, but it is an interesting tool, it may be useful for some of the assignments, and you can learn a lot about visualizations by trying to do things with it (it embeds a lot of knowledge about how to make good visualizations and tries to guide you).
However: Tableau provides free licenses for students that ask. You can apply for a student license on their web page. This may be better than using the class license, since it may last longer (it’s not clear how long the class license will last after class).