Video - How to Set Access Expiration Dates for Shared Google Docs
Much like you can set expiration dates for individual Google Documents, you can share your Google Drive folders and individual files for set durations of time. Watch How to Set Expiration Dates for Google Drive Folders & Files to learn how to place time limits on your sharing settings.
Applications for Education
Setting expiration dates for shared documents is helpful when you want to encourage your students to review a document before a specific time. It's also helpful when you want to publish something like a syllabus, but you don't want to have it published and live on the web indefinitely.