Hello,
Please use the search option before posting any discussion, there are lot discussions on the same topic,
What is the difference between Serial numbers and Batch management.
Serial number and Batch management In PP
Also refer useful SAP help documents,
Serial Number Management (LO-MD-SN) - SAP Library
Batch Management (LO-BM) - SAP Library
Batch Management (LO-BM) - SAP Library
Best Regards,
R.Brahmankar