Roles define what users can or cannot see and do in your Moodle system. Moodle comes with a number of pre-defined roles we already saw Student and Teacher but it also allows us to create our own roles; for instance, for parents or external assessors.

Each role has a certain scope (called context), which is defined by a set of permissions (expressed as capabilities). For example, a teacher is allowed to grade an assignment whereas a student isn't. Or, a student is allowed to submit an assignment, whereas a teacher isn't.

Okay, so what is a context? A context is a ring-fenced area in Moodle where roles can be assigned to users. A user can be assigned different roles in different contexts; where the context can be a course, a category, an activity module, a user, a block, the front page, or Moodle itself. For instance, you are assigned the Administrator role for the entire system, but additionally, you might be assigned the Teacher...