The noun learning can describe that thing that happens when you study for your calculus class and you suddenly understand functions. Learning refers to gaining skills or knowledge, often by studying or being taught by someone.
The word learning can be used to mean "the process of acquiring knowledge," like the learning that takes place in your classroom, but it also means the knowledge itself. For example, you’ve probably acquired your worm learning through hours and hours of backyard digging. If you continue to work hard, someone might describe you as a person of great learning, with respect to snails, at least.