The Learning Management System has often come to the fore with the increasing demand of Covid-19. Unlike ordinary training methods, LMS is a web software that enables remote education. To sum up briefly and simply, we can say that LMSs are the computerized version of the school.
You can read my reviews of Moodle and Edmodo. They are example of LMS.
Moodle : https://englishoffuture.blogspot.com/2020/12/moodle_23.html
Edmodo : https://englishoffuture.blogspot.com/2020/12/edmodo.html