SAP is nothing but an ERP solution. It's a big vendor and there are a lot of job opportunities available in this domain. With SAP MM certification you can learn SAP MM, where SAP MM stands for material management, and it is one of the important modules of sap logistics that's deals with vendor master, procurement, And material resource of the company.
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 tutorial on SAP Logistics provided by Intellipaat.
SAP MM module also records all the transactions that are related to goods and materials on a regular basis. And SAP MM also helps to implement the supply chain management i.e. (SCM) in an organization and enables control the inventory management, forecasts customer demand and updates all the transactions for the supply chain. With Intellipaat, you can learn SAP MM training in Chennai in detail.