I believe most of you will be aware of SAP’s market share, around 80% plus of giant and mid-sized firms are implemented SAP R/3 and successfully running their business, because of its real-time data processing & process integrations.
If you want to learn SAP MM from scratch, then here's the right video for you:
If you are more into reading, then do check out this material provided by Intellipaat:
SAP MM is one of the finest modules in SAP ERP, especially in Manufacturing & Trading Industries, which takes care of procurement and inventory management at its best. Most of the companies nowadays set SAP Global Certification is necessary & offering good package by considering domain experiences too, so you can get started as SAP MM Trainee Consultant/SAP MM Associate, gradually you can upgrade to SAP MM/WM or EWM to sustain in the field.