ITSM (IT Service Management) is an approach to IT management in organizations. This approach was invented by British scientists in the UK in the last century! And just today we are launching a free online course on introducing this miracle. The course consists of the main unit (4 slidecasts, revealing the basic concepts, terms and concepts), as well as a number of additional materials. The course is freely available, you can take it at any time. Also, at any time, you can stop and continue to self-educate whenever your heart desires.
You can argue for a long time whether ITSM is needed or not. But the fact is that knowledge of the approaches and practices associated with it (ITIL, for example) is the standard for an effective TM manager from IT. Therefore, if you:
IT manager: familiarize yourself with the course in order to achieve success and become an effective IT manager;
Effective IT manager: read the course to become even more effective;
You work under the authority of an effective IT manager: familiarize yourself with the course in order to understand what categories your manager thinks.