Many of the features in Moodle are carefully chosen to support a philosophy of learning, called social constructionist pedagogy. Simply stated, this style of learning and teaching is based on four concepts, which are constructivism, constructionism, social constructivism, and connected and separate:
Students acquire new knowledge as they interact with their environment, your course activities, and other students.
Students learn more when they construct learning experiences for others. You might be familiar with the "learning pyramid" which states that students remember 10% of what they read, 20% of what they hear, 30% of what is demonstrated to them, 50% of what they discuss, and 75% of what they practice. That same pyramid states that students retain 90% of what they teach others. You can check the learning pyramid at:
When students become part of a culture, they are constantly learning. For example, you and your partner would probably learn more about ballroom dancing when you're in a dance class, versus watching a video together. The interaction with other students and possibly a variety of teachers would enrich and accelerate your learning process.
Some students try to remain objective and factual, some try to accept more subjective views, and others try to integrate both approaches. Constructed behavior is when a student can choose whichever approach is more appropriate.
You are probably not accustomed to an application's features being chosen based on a philosophy. Usually, features are chosen based only on what is technically feasible and what customers are willing to pay for. These certainly are factors for the Moodle developers. However, the educational philosophy behind Moodle is also a criterion for adding features. This gives Moodle a tremendous advantage.
As Moodle is designed around a well-defined educational philosophy, its user interface is very consistent. I don't just mean in the traditional sense, where you compare the icons, colors, menu actions, and layout on each page to ensure they match, but as you go through a Moodle site, things look, feel, and function consistently. More importantly, you interact with each activity, your classmates, and the teacher in a consistent way, whether it's in the chat room, a forum, or by leaving feedback on a workshop. When interaction becomes easier, the student can focus more on learning, and less on the software.