SMS is a PHP-based school management software that aims to automate school operations and make them easy to use, maintain, and set up. It includes modules for courses and batches, human resources, attendance, timetables, exams, admissions, calendars, fees, messaging, alerts, libraries, hostels, and more. Each role like admin, principal, teacher, student, parent, office, and accounting has individual logins and dashboards. The admin has privileges to control the entire system including adding student and staff details, attendance, marks, the library, emails, and SMS.