A Learning Management System (LMS) is a software application used for

A Learning Management System is a software application used for creating virtual student-teacher groups and delivering online learning.

Marketing of offline courses is a promotional activity, not the purpose of an LMS.

Admission of students is handled by admission or ERP software, not by a learning management platform.

Creating institutional websites is a web-development task unrelated to managing teaching and learning.

An LMS hosts content, assessments, discussions and progress tracking in one place.

Moodle, Canvas and Google Classroom are common examples of an LMS.