What is Serialized and Non-serialized purchase?

Serialized purchase : Purchases involved in selling items which has a serial number assigned on it. For Example ESN’s. ESN’s can be added in serial order under inventory on Telgoo5 hence selling these items comes under serialized purchase.

Non-serialized means selling chargers, battery etc which will have bar codes on all the units. They are non-serialized and can be sold randomly