Do you push or pull when flux core welding?

As a financial professional with a keen interest in the application of technology in various industries, I'm curious about the technical intricacies of welding. Specifically, when it comes to flux core welding, a technique widely used in various manufacturing processes, I'm wondering: do you push or pull the welding gun? I understand that the answer to this question may vary depending on the specific material, the thickness of the metal, and the desired outcome, but I'm interested in understanding the general principles behind this choice. Can you elaborate on the factors that influence this decision and why it's important for achieving optimal weld quality?