While pulling might penetrate deeper, in most situations, pushing creates a flatter weld that covers more surface area. In some instances, this can create a stronger weld than what you might get with the pull technique. As mentioned, pulling allows you to watch your bead as its being produced.

Should you push or pull when welding?

Many welders are not big fans of pushing a weld, but if you need some added visibility of the joint, it's tough to beat pulling a weld. In addition, you'll find that plenty of welders push their welds uphill in the hope of getting better visibility and penetration into the joint.