The products and software that Adobe offers are some of the best available. Photoshop, Illustrator, and Acrobat are just a few of the professional-level products that they offer. Depending on circumstances, CUI can offers their products to select Students, Staff, and Faculty.
Creative Cloud is a licensing management application that Adobe uses to confirm that you have a license to run any of their software. Logging in to Creative Cloud allows Adobe to confirm this and then allows you to use Acrobat, Photoshop, Illustrator, or whatever else you may need.