You'll take a variety of different courses for a communications degree. If you choose an emphasis (like writing or business communication), you'll have a few more specific courses for those, but you can take a ton of different communications courses as electives to fulfill your degree requirements.
I'm taking a general communications studies course load and here are some of the classes I either have taken or can take to count toward my degree: communication theory, communication technology trends, public speaking, business and professional writing, business and professional speaking, intercultural communication, composition 1 & 2, public relations, event planning, editing, human relationships & leadership, crisis communication, organizational communication, and an internship. There's probably more I forgot!
If you're interested in looking at more sources, you can usually find a list online for whatever college you plan on going to that will tell you all the required courses & available electives. I really love learning about communication, it's a very interesting subject & many of the themes from the various courses intertwine with each other, which makes it a little easier to understand as you go along. Good luck!