To inform and remind students (and even lecturers) of the meaning each of Importance Level, it would be useful if a little pop-up appeared with the definition when either:
an Importance Level was hovered on, OR
an ⓘ symbol next to the Importance Level was clicked
This could be a feature that list creators choose to turn on/off for individual reading lists eg. Turn on for lists for first-year students who are new to reading lists, and 'transitioning' into tertiary study.
As part of this can we presume the library would want the ability to create the text that appears in the definition (however that might appear)?