The concept here is controlling heat input by breaking a long weld into short bursts. By placing a series of small welds with gaps along the joint, you apply heat in bursts and allow each area to cool a bit before the next weld. This spreads the heat over a larger area and lowers the peak temperature in the base metal, which helps minimize distortion, warping, and burn-through—especially important on thin automotive sheet metal. Continuous welds concentrate heat along the entire seam, increasing the risk of distortion. The term used for intentionally spaced welds to spread heat is skip weld, which matches this description. While stitch welds also involve small, spaced welds, the wording here aligns with the skip-weld idea of distributing heat with deliberate gaps. Plug welds, alternating or otherwise, refer to a different joint detail and aren’t about spreading heat along a seam in the same way.