In the People Management tab, CSV file uploads can be used to add new users and update existing users on your account, grant admin permissions, send custom invitation emails, and remove users. (See Learn more section below.)
Please review the guide Adding and Managing Users in Bulk via CSV Org Sync to learn more.
Here's a tip
Higher Education admins, please review "Learning CSV upload" article in the Learn more section below to learn more about adding users via CSV upload.