An assignment aims to test your practical abilities as a learner, and therefore the assignment topic or subject area isn't defined. It can relate to any topic or broader aspect of your discipline or be based on any new research topic.
It is rare to find an assignment that stems directly from the notebook. Assignments are integral to academic curriculums and are here to bridge the gap between the classroom and real-time learning. The assignment question thus relates to ethical conduct, any new research or development, and more.
Since these assignments take a lot of research and referencing, students look for assignment makers who are into helping them with the best techniques and tools.