Serial Number Profile in SAP PP

Hi Experts,

Please explain to me in work scheduling view we have an " serial number profile",what is the purpose "serial number profile"please give me an brief explanation ??

and how will impact (or) how it's checking the serial number profile during order creation(T-code CO01)time.and Order Release(CO01/CO02) time.can you explain in brief.?

Thanksℜgards,
Sree.