The Import Users module is a great way to both create new users in bulk and add them to courses and LearnDash Groups, all from a CSV file. You can also update existing users via CSV import too. After creating or updating an account your users can be notified by email. The ability to manage a large number of users via CSV import will save you a lot of time.
The Import Users module is very complex and we recommend watching the following YouTube video as well as visit the knowledgebase for full details on the Import Users module.