What is the difference between primary and secondary product in byproduct utilization?

Well, honey, the primary product is the main focus of production, while the secondary product is an additional product that comes from the same process. Byproduct utilization is all about making the most out of every little thing that comes out of a production process, whether it's the star of the show or just a sidekick. So, remember, primary is the headliner and secondary is the supporting act in the grand circus of byproduct utilization.